AB(diag)-42

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

17.Diagnostic Chart with Trouble Code

A: DTC U0073 CONTROL MODULE COMMUNICATION BUS OFF

DIAGNOSIS START CONDITION:

Ignition voltage remains at 10 V or more for 1 second.

DTC DETECTING CONDITION:

This is detected when a CAN line malfunction occurs.

NOTE:

Perform the diagnosis for LAN system. <Ref. to LAN(diag)-2, PROCEDURE, Basic Diagnostic Procedure.>

B: DTC B1000 AIRBAG ECU MALFUNCTION

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

Step Check Yes No

1 CHECK DTC.

Read the DTC. (Current malfunction) <Ref. to

AB(diag)-25, Read Diagnostic Trouble Code

(DTC).>

Is any of B1000, B1003, B1105,

B1106, B1115, B1116, B1170,

B1185, B1195, B1196 or

B1199 displayed?

Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Perform the Clear

Memory Mode.

<Ref. to AB(diag)-

27, Clear Memory

Mode.>

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AB(diag)-43

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

C: DTC B1003 AIRBAG ECU MALFUNCTION

NOTE:

Refer to DTC B1103 for details on DTC B1000. <Ref. to AB(diag)-42, DTC B1000 AIRBAG ECU MALFUNC-

TION, Diagnostic Chart with Trouble Code.>

D: DTC B1105 AIRBAG ECU MALFUNCTION

NOTE:

Refer to DTC B1105 for details on DTC B1000. <Ref. to AB(diag)-42, DTC B1000 AIRBAG ECU MALFUNC-

TION, Diagnostic Chart with Trouble Code.>

E: DTC B1106 AIRBAG ECU MALFUNCTION

NOTE:

Refer to DTC B1106 for details on DTC B1000. <Ref. to AB(diag)-42, DTC B1000 AIRBAG ECU MALFUNC-

TION, Diagnostic Chart with Trouble Code.>

F: DTC B1115 AIRBAG ECU MALFUNCTION

NOTE:

Refer to DTC B1115 for details on DTC B1000. <Ref. to AB(diag)-42, DTC B1000 AIRBAG ECU MALFUNC-

TION, Diagnostic Chart with Trouble Code.>

G: DTC B1116 AIRBAG ECU MALFUNCTION

NOTE:

Refer to DTC B1116 for details on DTC B1000. <Ref. to AB(diag)-42, DTC B1000 AIRBAG ECU MALFUNC-

TION, Diagnostic Chart with Trouble Code.>

H: DTC B1170 AIRBAG ECU MALFUNCTION

NOTE:

Refer to DTC B1170 for details on DTC B1000. <Ref. to AB(diag)-42, DTC B1000 AIRBAG ECU MALFUNC-

TION, Diagnostic Chart with Trouble Code.>

I: DTC B1185 AIRBAG ECU MALFUNCTION

NOTE:

Refer to DTC B1185 for details on DTC B1000. <Ref. to AB(diag)-42, DTC B1000 AIRBAG ECU MALFUNC-

TION, Diagnostic Chart with Trouble Code.>

J: DTC B1195 AIRBAG ECU MALFUNCTION

NOTE:

Refer to DTC B1195 for details on DTC B1000. <Ref. to AB(diag)-42, DTC B1000 AIRBAG ECU MALFUNC-

TION, Diagnostic Chart with Trouble Code.>

K: DTC B1196 AIRBAG ECU MALFUNCTION

NOTE:

Refer to DTC B1196 for details on DTC B1000. <Ref. to AB(diag)-42, DTC B1000 AIRBAG ECU MALFUNC-

TION, Diagnostic Chart with Trouble Code.>

L: DTC B1199 AIRBAG ECU MALFUNCTION

NOTE:

Refer to DTC B1199 for details on DTC B1000. <Ref. to AB(diag)-42, DTC B1000 AIRBAG ECU MALFUNC-

TION, Diagnostic Chart with Trouble Code.>

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AB(diag)-44

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

M: DTC B11E0 ROLLOVER IGNITION

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

This DTC is indicated when the curtain airbag module and the seat belt pretensioner are deployed.

Once this DTC is displayed, the memory cannot be cleared. Replace the following parts.

• Airbag control module <Ref. to AB-48, Airbag Control Module.>

• Curtain airbag module <Ref. to AB-46, Curtain Airbag Module.>

• Front outer seat belt with pretensioner <Ref. to SB-16, Front Seat Belt.>

N: DTC B11F2 FRONT IMPACT IGNITION

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

This DTC is indicated when the front airbag module and the pretensioner are deployed.

Once this DTC is displayed, the memory cannot be cleared. Therefore replace the following parts.

• Airbag control module <Ref. to AB-48, Airbag Control Module.>

• Driver’s airbag module <Ref. to AB-33, Driver’s Airbag Module.>

• Passenger’s airbag module <Ref. to AB-36, Passenger’s Airbag Module.>

• Driver’s knee airbag module <Ref. to AB-35, Knee Airbag Module.>

• Front sub sensor of both sides <Ref. to AB-50, Front Sub Sensor.>

• Front outer seat belt with pretensioner of both sides <Ref. to SB-16, Front Seat Belt.>

• Steering roll connector <Ref. to AB-60, Roll Connector.>

• Occupant detection system (passenger’s seat cushion & frame assembly) <Ref. to SE-9, Front Seat.>

• Side airbag module on both sides (when activated) <Ref. to AB-54, Side Airbag Sensor.>

• Curtain airbag module on both sides (when activated) <Ref. to AB-46, Curtain Airbag Module.>

O: DTC B11F3 FRONT IMPACT IGNITION

NOTE:

For details on DTC B11F3, refer to DTC B11F2. <Ref. to AB(diag)-44, DTC B11F2 FRONT IMPACT IGNI-

TION, Diagnostic Chart with Trouble Code.>

P: DTC B11F4 FRONT IMPACT IGNITION

NOTE:

For details on DTC B11F4, refer to DTC B11F2. <Ref. to AB(diag)-44, DTC B11F2 FRONT IMPACT IGNI-

TION, Diagnostic Chart with Trouble Code.>

Q: DTC B11F5 FRONT IMPACT IGNITION

NOTE:

For details on DTC B11F5, refer to DTC B11F2. <Ref. to AB(diag)-44, DTC B11F2 FRONT IMPACT IGNI-

TION, Diagnostic Chart with Trouble Code.>

15WRX_STI_US_EN.book 44 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-45

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

R: DTC B11F7 SIDE IMPACT IGNITION

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

This DTC is displayed when the side airbag module and curtain airbag module are deployed.

Once this DTC is displayed, the memory cannot be cleared. Replace the following parts.

• Airbag control module <Ref. to AB-48, Airbag Control Module.>

• Side airbag module (operating side) <Ref. to AB-43, Side Airbag Module.>

• Side airbag sensor (operating side) <Ref. to AB-54, Side Airbag Sensor.>

• Curtain airbag module (operating side) <Ref. to AB-46, Curtain Airbag Module.>

• Curtain airbag sensor (operating side) <Ref. to AB-56, Curtain Airbag Sensor.>

• Satellite safing sensor <Ref. to AB-58, Satellite Safing Sensor.>

• Front door impact sensor (operating side) <Ref. to AB-52, Front Door Impact Sensor.>

• Front outer seat belt with pretensioner on the collision side (when activated) <Ref. to SB-16, Front Seat

Belt.>

S: DTC B11F8 SIDE IMPACT IGNITION

NOTE:

For details on DTC B11F8. refer to DTC B11F7. <Ref. to AB(diag)-45, DTC B11F7 SIDE IMPACT IGNITION,

Diagnostic Chart with Trouble Code.>

T: DTC B11F9 SIDE IMPACT IGNITION

NOTE:

For details on DTC B11F9, refer to DTC B11F7. <Ref. to AB(diag)-45, DTC B11F7 SIDE IMPACT IGNITION,

Diagnostic Chart with Trouble Code.>

U: DTC B11FA SIDE IMPACT IGNITION

NOTE:

For details on DTC B11FA, refer to DTC B11F7. <Ref. to AB(diag)-45, DTC B11F7 SIDE IMPACT IGNITION,

Diagnostic Chart with Trouble Code.>

V: DTC B11FB SIDE IMPACT IGNITION

NOTE:

For details on DTC B11FB, refer to DTC B11F7. <Ref. to AB(diag)-45, DTC B11F7 SIDE IMPACT IGNITION,

Diagnostic Chart with Trouble Code.>

W: DTC B11FC SIDE IMPACT IGNITION

NOTE:

For details on DTC B11FC, refer to DTC B11F7. <Ref. to AB(diag)-45, DTC B11F7 SIDE IMPACT IGNITION,

Diagnostic Chart with Trouble Code.>

X: DTC B1610 FRONT SUB SENSOR RH FAILURE

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

Front sub sensor RH is faulty.

If DTC B1610 is displayed, the circuit within the front sub sensor RH is faulty.

Replace the front sub sensor RH. <Ref. to AB-50, Front Sub Sensor.>

Y: DTC B1612 FRONT SUB SENSOR RH LOST COMMUNICATION

NOTE:

For details on DTC B1612, refer to DTC B1613. <Ref. to AB(diag)-46, DTC B1613 FRONT SUB SENSOR

RH INITIALIZATION ERROR, Diagnostic Chart with Trouble Code.>

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AB(diag)-46

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

Z: DTC B1613 FRONT SUB SENSOR RH INITIALIZATION ERROR

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Open or short circuit in harness of front sensor bus RH.

• Front sub sensor RH is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors (AB6,

AB16) between the airbag control module and

the front sub sensor RH.

Is there poor contact? Replace the airbag

main harness

along with body

harness.

Go to step 2.

AB-02830

AB6

1234567

11 12 13 14

15 16 17 18 19 20

21 22 23 24 25 26 27 28 29 30

AB16

AB6

FRONT SUB SENSOR RH

AIRBAG CM

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AB(diag)-47

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

2 CHECK AIRBAG MAIN HARNESS (FRONT

SENSOR BUS RH).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Remove the instrument panel lower cover

and column cover, and disconnect the connec-

tors (AB7) and (AB2).

3) Remove the console front panel and discon-

nect the connector (AB9).

4) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

5) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

6) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

7) Disconnect the connector (AB16) from the

front sub sensor RH, and then connect the con-

nector (1H) in the test harness H to connector

(AB16).

8) Measure the resistance between connector

(4AG) in the test harness AG and connector

(3H) in the test harness H.

Connector & terminal

(4AG) No. 14 — (3H) No. 5:

(4AG) No. 12 — (3H) No. 6:

Is the resistance less than 10

Ω?

Go to step 3. Replace the airbag

main harness

along with body

harness.

3 CHECK AIRBAG MAIN HARNESS (FRONT

SENSOR BUS RH).

Measure the resistance between connector

(4AG) in the test harness AG and chassis

ground, and the resistance between connector

(4AG) terminals in the test harness AG.

Connector & terminal

(4AG) No. 12 — Chassis ground:

(4AG) No. 14 — Chassis ground:

(4AG) No. 12 — (4AG) No. 14:

Is the resistance 1 MΩ or

more?

Go to step 4. Replace the airbag

main harness

along with body

harness.

4 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the front

sub sensor RH.

<Ref. to AB-50,

REMOVAL, Front

Sub Sensor.>

Replace the airbag

control module if

not operating nor-

mally even after

replacing the sen-

sor. <Ref. to AB-

48, REMOVAL, Air-

bag Control Mod-

ule.>

Go to step 5.

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code”.

<Ref. to AB(diag)-

33, List of Diagnos-

tic Trouble Code

(DTC).>

Finish the diagno-

sis.

Step Check Yes No

15WRX_STI_US_EN.book 47 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-48

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

AA:DTC B1615 FRONT SUB SENSOR LH FAILURE

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

Front sub sensor LH is faulty.

If DTC B1615 is displayed, the circuit within the front sub sensor LH is faulty.

Replace the front sub sensor LH. <Ref. to AB-50, Front Sub Sensor.>

AB:DTC B1617 FRONT SUB SENSOR LH LOST COMMUNICATION

NOTE:

For details on DTC B1617, refer to DTC B1618. <Ref. to AB(diag)-49, DTC B1618 FRONT SUB SENSOR

LH INITIALIZATION ERROR, Diagnostic Chart with Trouble Code.>

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AB(diag)-49

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

AC:DTC B1618 FRONT SUB SENSOR LH INITIALIZATION ERROR

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Open or short circuit in harness of front sensor bus LH.

• Front sub sensor LH is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors (AB6,

AB13) between the airbag control module and

the front sub sensor LH.

Is there poor contact? Replace the airbag

main harness

along with body

harness.

Go to step 2.

AB-02831

AB6

1234567

11 12 13 14

15 16 17 18 19 20

21 22 23 24 25 26 27 28 29 30

AB13

AB6

FRONT SUB SENSOR LH

AIRBAG CM

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AB(diag)-50

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

2 CHECK AIRBAG MAIN HARNESS (FRONT

SENSOR BUS LH).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Remove the instrument panel lower cover

and column cover, and disconnect the connec-

tors (AB7) and (AB2).

3) Remove the console front panel and discon-

nect the connector (AB9).

4) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

5) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

6) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

7) Disconnect the connector (AB13) from the

front sub sensor LH, and then connect the con-

nector (1H) in the test harness H to connector

(AB13).

8) Measure the resistance between connector

(4AG) in the test harness AG and connector

(3H) in the test harness H.

Connector & terminal

(4AG) No. 7 — (3H) No. 5:

(4AG) No. 9 — (3H) No. 6:

Is the resistance less than 10

Ω?

Go to step 3. Replace the airbag

main harness

along with body

harness.

3 CHECK AIRBAG MAIN HARNESS (FRONT

SENSOR BUS LH).

Measure the resistance between connector

(4AG) in the test harness AG and chassis

ground, and the resistance between connector

(4AG) terminals in the test harness AG.

Connector & terminal

(4AG) No. 7 — Chassis ground:

(4AG) No. 9 — Chassis ground:

(4AG) No. 7 — (4AG) No. 9:

Is the resistance 1 MΩ or

more?

Go to step 4. Replace the airbag

main harness

along with body

harness.

4 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the front

sub sensor LH.

<Ref. to AB-50,

REMOVAL, Front

Sub Sensor.>

Replace the airbag

control module if

not operating nor-

mally even after

replacing the sen-

sor. <Ref. to AB-

48, REMOVAL, Air-

bag Control Mod-

ule.>

Go to step 5.

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code”.

<Ref. to AB(diag)-

33, List of Diagnos-

tic Trouble Code

(DTC).>

Finish the diagno-

sis.

Step Check Yes No

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AB(diag)-51

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

AD:DTC B16F2 FRONT SUB SENSOR RH RECOGNITION ERROR

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

Front sub sensor RH is wrongly installed.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

AE:DTC B16F3 FRONT SUB SENSOR LH RECOGNITION ERROR

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

Front sub sensor LH is wrongly installed.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

AF:DTC B1620 SIDE AIRBAG SENSOR RH FAILURE

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

Side airbag sensor RH is faulty.

When DTC B1620 is displayed, the circuit within the side airbag sensor RH is faulty.

Replace the side airbag sensor RH. <Ref. to AB-54, Side Airbag Sensor.>

AG:DTC B1622 SIDE AIRBAG SENSOR RH LOST COMMUNICATION

NOTE:

For details on DTC B1622, refer to DTC B1623. <Ref. to AB(diag)-52, DTC B1623 SIDE AIRBAG SENSOR

RH INITIALIZATION ERROR, Diagnostic Chart with Trouble Code.>

Step Check Yes No

1 REPLACE FRONT SUB SENSOR.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Replace the front sub sensor RH with a gen-

uine sensor. <Ref. to AB-50, REMOVAL, Front

Sub Sensor.>

Does the warning light go off? Finish the diagno-

sis.

Replace the airbag

control module.

<Ref. to AB-48,

REMOVAL, Airbag

Control Module.>

Step Check Yes No

1 REPLACE FRONT SUB SENSOR.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Replace the front sub sensor LH with a gen-

uine sensor. <Ref. to AB-50, REMOVAL, Front

Sub Sensor.>

Does the warning light go off? Finish the diagno-

sis.

Replace the airbag

control module.

<Ref. to AB-48,

REMOVAL, Airbag

Control Module.>

15WRX_STI_US_EN.book 51 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-52

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

AH:DTC B1623 SIDE AIRBAG SENSOR RH INITIALIZATION ERROR

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Open or short circuit in harness of side sensor bus RH.

• Side airbag sensor RH and curtain airbag sensor RH are faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module and the side

airbag sensor RH.

Is there poor contact? Replace the airbag

rear harness along

with body harness.

Go to step 2.

1524

1514

11 12

AB18

AB63 R124

AB63AB64

AB34

AB33

AB18

AB28

AB34

AB24

AB64

AB24

AB28

AB-03477

AIRBAG CM

CURTAIN

AIRBAG

SENSOR RH

SIDE

AIRBAG

MODULE RH

SIDE

AIRBAG

SENSOR RH

CURTAIN

AIRBAG

MODULE RH

FRONT

DOOR IMPACT

SENSOR RH

15WRX_STI_US_EN.book 52 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-53

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

2 CHECK AIRBAG REAR HARNESS (BE-

TWEEN AIRBAG CONTROL MODULE AND

SIDE AIRBAG SENSOR RH).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB26) from seat

belt pretensioner RH.

3) Disconnect the connector (AB33) from cur-

tain airbag module RH.

4) Disconnect the connector (AB24) of side

airbag module RH.

5) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

6) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

7) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

8) Disconnect the connector (AB28) from side

airbag sensor RH, and connect the connector

(2V) in test harness V to connector (AB28).

9) Measure the resistance between connector

(5AG) in the test harness AG and connector

(3V) in the test harness V.

Connector & terminal

(5AG) No. 14 — (3V) No. 1:

(5AG) No. 15 — (3V) No. 2:

Is the resistance less than 10

Ω?

Go to step 3. Replace the airbag

rear harness along

with body harness.

3 CHECK AIRBAG REAR HARNESS (BE-

TWEEN AIRBAG CONTROL MODULE AND

SIDE AIRBAG SENSOR RH).

Measure the resistance between test harness

AG connectors (5AG) and chassis ground, and

the resistance between connectors (5AG) of the

test harness AG.

Connector & terminal

(3V) No. 1 — Chassis ground:

(3V) No. 2 — Chassis ground:

(3V) No. 1 — (3V) No. 2:

Is the resistance 1 MΩ or

more?

Go to step 4. Replace the airbag

rear harness along

with body harness.

4 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Go to step 5. Go to step 6.

5 REPLACE SIDE AIRBAG SENSOR RH AND

CHECK AIRBAG CONTROL MODULE AF-

TER REPLACEMENT.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Replace the side airbag sensor RH. <Ref. to

AB-54, REMOVAL, Side Airbag Sensor.>

3) Connect all connectors.

4) Clear the memory.

5) Perform the Inspection Mode.

6) Read the DTC. (Current malfunction)

Is the system normal? Go to step 6. Replace the cur-

tain airbag sensor

RH. <Ref. to AB-

56, REMOVAL,

Curtain Airbag

Sensor.> Replace

the airbag control

module if not oper-

ating normally

even after replac-

ing the sensor.

<Ref. to AB-48,

REMOVAL, Airbag

Control Module.>

Step Check Yes No

15WRX_STI_US_EN.book 53 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-54

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

AI: DTC B1625 SIDE AIRBAG SENSOR LH FAILURE

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

Side airbag sensor LH is faulty.

When DTC B1625 is displayed, the circuit within the side airbag sensor LH is faulty.

Replace the side airbag sensor LH. <Ref. to AB-54, Side Airbag Sensor.>

AJ:DTC B1627 SIDE AIRBAG SENSOR LH LOST COMMUNICATION

NOTE:

Refer to DTC B1627 for details on DTC B1628. <Ref. to AB(diag)-55, DTC B1628 SIDE AIRBAG SENSOR

LH INITIALIZATION ERROR, Diagnostic Chart with Trouble Code.>

6 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

15WRX_STI_US_EN.book 54 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-55

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

AK:DTC B1628 SIDE AIRBAG SENSOR LH INITIALIZATION ERROR

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Open or short circuit in harness of side sensor bus LH.

• Side airbag sensor LH and curtain airbag sensor LH are faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module and the side

airbag sensor LH.

Is there poor contact? Replace the airbag

rear harness along

with body harness.

Go to step 2.

AB17

1211

14 15

4251

AB62AB58

AB31

AB23

AB32

AB19

AB62 R123

AB32

AB31

AB17

AB58

AB19

AB23

AB-03478

AIRBAG CM

CURTAIN

AIRBAG

SENSOR LH

SIDE

AIRBAG

MODULE LH

SIDE

AIRBAG

SENSOR LH

CURTAIN

AIRBAG

MODULE LH

FRONT

DOOR IMPACT

SENSOR LH

15WRX_STI_US_EN.book 55 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-56

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

2 CHECK AIRBAG REAR HARNESS (BE-

TWEEN AIRBAG CONTROL MODULE AND

SIDE AIRBAG SENSOR LH).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB21) from seat

belt pretensioner LH.

3) Disconnect the connector (AB31) from cur-

tain airbag module LH.

4) Disconnect the connector (AB19) of the side

airbag module LH.

5) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

6) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

7) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

8) Disconnect the connector (AB23) from side

airbag sensor LH, and connect the connector

(2V) in test harness V to connector (AB23).

9) Measure the resistance between connector

(5AG) in the test harness AG and connector

(3V) in the test harness V.

Connector & terminal

(5AG) No. 9 — (3V) No. 2:

(5AG) No. 10 — (3V) No. 1:

Is the resistance less than 10

Ω?

Go to step 3. Replace the airbag

rear harness along

with body harness.

3 CHECK AIRBAG REAR HARNESS (BE-

TWEEN AIRBAG CONTROL MODULE AND

SIDE AIRBAG SENSOR LH).

Measure the resistance between test harness

AG connectors (5AG) and chassis ground, and

the resistance between connectors (5AG) of the

test harness AG.

Connector & terminal

(3V) No. 1 — Chassis ground:

(3V) No. 2 — Chassis ground:

(3V) No. 1 — (3V) No. 2:

Is the resistance 1 MΩ or

more?

Go to step 4. Replace the airbag

rear harness along

with body harness.

4 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Go to step 5. Go to step 6.

5 REPLACE SIDE AIRBAG SENSOR LH AND

CHECK AIRBAG CONTROL MODULE AF-

TER REPLACEMENT.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Replace the side airbag sensor LH. <Ref. to

AB-54, REMOVAL, Side Airbag Sensor.>

3) Connect all connectors.

4) Clear the memory.

5) Perform the Inspection Mode.

6) Read the DTC. (Current malfunction)

Is the system normal? Go to step 6. Replace the cur-

tain airbag sensor

LH. <Ref. to AB-

56, REMOVAL,

Curtain Airbag

Sensor.> Replace

the airbag control

module if not oper-

ating normally

even after replac-

ing the sensor.

<Ref. to AB-48,

REMOVAL, Airbag

Control Module.>

Step Check Yes No

15WRX_STI_US_EN.book 56 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-57

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

AL:DTC B1630 CURTAIN AIRBAG SENSOR RH FAILURE

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

Curtain airbag sensor RH is faulty.

If DTC B1630 is displayed, the circuit within the curtain airbag sensor RH is faulty.

Replace the curtain airbag sensor RH. <Ref. to AB-56, Curtain Airbag Sensor.>

AM:DTC B1632 CURTAIN AIRBAG SENSOR RH LOST COMMUNICATION

NOTE:

Refer to DTC B1632 for details on DTC B1633. <Ref. to AB(diag)-58, DTC B1633 CURTAIN AIRBAG SEN-

SOR RH INITIALIZATION ERROR, Diagnostic Chart with Trouble Code.>

6 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

15WRX_STI_US_EN.book 57 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-58

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

AN:DTC B1633 CURTAIN AIRBAG SENSOR RH INITIALIZATION ERROR

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Open or short circuit in harness of side sensor bus RH.

• Side airbag sensor RH and curtain airbag sensor RH are faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK DTC.

Read the DTC. (Current malfunction)

Is DTC B1622 or B1623 dis-

played?

Perform the diag-

nosis according to

DTC.

Go to step 2.

2 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module and the door

sensor RH.

Is there poor contact? Replace the airbag

rear harness and

the door harness.

Go to step 3.

1524

1514

11 12

AB18

AB63 R124

AB63AB64

AB34

AB33

AB18

AB28

AB34

AB24

AB64

AB24

AB28

AB-03477

AIRBAG CM

CURTAIN

AIRBAG

SENSOR RH

SIDE

AIRBAG

MODULE RH

SIDE

AIRBAG

SENSOR RH

CURTAIN

AIRBAG

MODULE RH

FRONT

DOOR IMPACT

SENSOR RH

15WRX_STI_US_EN.book 58 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-59

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

3 CHECK AIRBAG REAR HARNESS (BE-

TWEEN SIDE AIRBAG SENSOR RH AND

CURTAIN AIRBAG SENSOR RH).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB26) from seat

belt pretensioner RH.

3) Disconnect the connector (AB33) from cur-

tain airbag module RH.

4) Disconnect the connector (AB24) of side

airbag module RH.

5) Disconnect the connector (AB28) of side

airbag sensor RH.

6) Connect the connector (AB28) of side air-

bag sensor RH and the connector (1AI) in the

test harness AI.

7) Connect the connector (2AI) in the test har-

ness AI and the connector (1V) in the test har-

ness V.

8) Disconnect the connector (AB34) from cur-

tain airbag sensor (RH), and connect the con-

nector (2V) in test harness V to connector

(AB34).

9) Measure the resistance between connector

(3V) terminals in the test harness V.

Connector & terminal

(3V) No. 2 — (3V) No. 6:

(3V) No. 1 — (3V) No. 7:

Is the resistance less than 10

Ω?

Go to step 4. Replace the airbag

rear harness along

with body harness.

4 CHECK AIRBAG REAR HARNESS (BE-

TWEEN SIDE AIRBAG SENSOR AND CUR-

TAIN AIRBAG SENSOR RH).

Measure the resistance between connector

(3V) in test harness V and chassis ground, and

the resistance between connector (3V) in test

harness V.

Connector & terminal

(3V) No. 2 — Chassis ground:

(3V) No. 1 — Chassis ground:

(3V) No. 2 — (3V) No. 1:

Is the resistance 1 MΩ or

more?

Go to step 5. Replace the airbag

rear harness along

with body harness.

5 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Go to step 6. Go to step 7.

6 REPLACE CURTAIN AIRBAG SENSOR RH

AND CHECK AIRBAG CONTROL MODULE

AFTER REPLACEMENT.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Replace the curtain airbag sensor RH.

<Ref. to AB-56, REMOVAL, Curtain Airbag

Sensor.>

3) Connect all connectors.

4) Clear the memory.

5) Perform the Inspection Mode.

6) Read the DTC. (Current malfunction)

Is the same DTC displayed? Go to step 7. Go to step 8.

Step Check Yes No

15WRX_STI_US_EN.book 59 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-60

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

AO:DTC B1635 CURTAIN AIRBAG SENSOR LH FAILURE

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

Curtain airbag sensor LH is faulty.

If DTC B1635 is displayed, the circuit within the curtain airbag sensor LH is faulty.

Replace the curtain airbag sensor LH. <Ref. to AB-56, Curtain Airbag Sensor.>

AP:DTC B1637 CURTAIN AIRBAG SENSOR LH LOST COMMUNICATION

NOTE:

Refer to DTC B1637 for details on DTC B1638. <Ref. to AB(diag)-61, DTC B1638 CURTAIN AIRBAG SEN-

SOR LH INITIALIZATION ERROR, Diagnostic Chart with Trouble Code.>

7 REPLACE SIDE AIRBAG SENSOR RH AND

CHECK AIRBAG CONTROL MODULE AF-

TER REPLACEMENT.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Replace the side airbag sensor RH. <Ref. to

AB-54, REMOVAL, Side Airbag Sensor.>

3) Connect all connectors.

4) Clear the memory.

5) Perform the Inspection Mode.

6) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

REMOVAL, Airbag

Control Module.>

Go to step 8.

8 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

15WRX_STI_US_EN.book 60 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-61

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

AQ:DTC B1638 CURTAIN AIRBAG SENSOR LH INITIALIZATION ERROR

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Open or short circuit in harness of side sensor bus LH.

• Side airbag sensor LH and curtain airbag sensor LH are faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK DTC.

Read the DTC. (Current malfunction)

Is DTC B1627 or B1628 dis-

played?

Perform the diag-

nosis according to

DTC.

Go to step 2.

2 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module and the door

sensor LH.

Is there poor contact? Replace the airbag

rear harness and

the door harness.

Go to step 3.

AB17

1211

14 15

4251

AB62AB58

AB31

AB23

AB32

AB19

AB62 R123

AB32

AB31

AB17

AB58

AB19

AB23

AB-03478

AIRBAG CM

CURTAIN

AIRBAG

SENSOR LH

SIDE

AIRBAG

MODULE LH

SIDE

AIRBAG

SENSOR LH

CURTAIN

AIRBAG

MODULE LH

FRONT

DOOR IMPACT

SENSOR LH

15WRX_STI_US_EN.book 61 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-62

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

3 CHECK AIRBAG REAR HARNESS (BE-

TWEEN SIDE AIRBAG SENSOR LH AND

CURTAIN AIRBAG SENSOR LH).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB21) from seat

belt pretensioner LH.

3) Disconnect the connector (AB31) from cur-

tain airbag module LH.

4) Disconnect the connector (AB19) of the side

airbag module LH.

5) Disconnect the connector (AB23) in the side

airbag sensor LH.

6) Connect the connector (AB23) of side air-

bag sensor LH and the connector (1AI) in the

test harness AI.

7) Connect the connector (2AI) in the test har-

ness AI and the connector (1V) in the test har-

ness V.

8) Disconnect the connector (AB32) from cur-

tain airbag sensor LH, and connect it to the con-

nector (2V) in test harness V.

9) Measure the resistance between connector

(3V) terminals in the test harness V.

Connector & terminal

(3V) No. 2 — (3V) No. 6:

(3V) No. 1 — (3V) No. 7:

Is the resistance less than 10

Ω?

Go to step 4. Replace the airbag

rear harness along

with body harness.

4 CHECK AIRBAG REAR HARNESS (BE-

TWEEN SIDE AIRBAG SENSOR AND CUR-

TAIN AIRBAG SENSOR LH).

Measure the resistance between connector

(3V) in test harness V and chassis ground, and

the resistance between connector (3V) in test

harness V.

Connector & terminal

(3V) No. 1 — Chassis ground:

(3V) No. 2 — Chassis ground:

(3V) No. 1 — (3V) No. 2:

Is the resistance 1 MΩ or

more?

Go to step 5. Replace the airbag

rear harness along

with body harness.

5 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Go to step 6. Go to step 8.

6 REPLACE CURTAIN AIRBAG SENSOR LH

AND CHECK AIRBAG CONTROL MODULE

AFTER REPLACEMENT.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Replace the curtain airbag sensor LH. <Ref.

to AB-56, REMOVAL, Curtain Airbag Sensor.>

3) Connect all connectors.

4) Clear the memory.

5) Perform the Inspection Mode.

6) Read the DTC. (Current malfunction)

Is the same DTC displayed? Go to step 7. Go to step 8.

Step Check Yes No

15WRX_STI_US_EN.book 62 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-63

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

7 REPLACE SIDE AIRBAG SENSOR LH AND

CHECK AIRBAG CONTROL MODULE AF-

TER REPLACEMENT.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Replace the side airbag sensor LH. <Ref. to

AB-54, REMOVAL, Side Airbag Sensor.>

3) Connect all connectors.

4) Clear the memory.

5) Perform the Inspection Mode.

6) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

REMOVAL, Airbag

Control Module.>

Go to step 8.

8 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

15WRX_STI_US_EN.book 63 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-64

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

AR:DTC B16F4 SIDE AIRBAG SENSOR RH RECOGNITION ERROR

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Side airbag sensor RH is misinstalled.

• Airbag CM is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

AS:DTC B16F5 SIDE AIRBAG SENSOR LH RECOGNITION ERROR

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Side airbag sensor LH is misinstalled.

• Airbag CM is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

Step Check Yes No

1 REPLACE SIDE AIRBAG SENSOR RH.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Replace the side airbag sensor RH with a

genuine sensor. <Ref. to AB-54, REMOVAL,

Side Airbag Sensor.>

Does the warning light go off? Finish the diagno-

sis.

Replace the airbag

control module.

<Ref. to AB-48,

REMOVAL, Airbag

Control Module.>

Step Check Yes No

1 REPLACE SIDE AIRBAG SENSOR LH.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Replace the side airbag sensor LH with a

genuine sensor. <Ref. to AB-54, REMOVAL,

Side Airbag Sensor.>

Does the warning light go off? Finish the diagno-

sis.

Replace the airbag

control module.

<Ref. to AB-48,

REMOVAL, Airbag

Control Module.>

15WRX_STI_US_EN.book 64 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-65

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

AT:DTC B16F6 CURTAIN AIRBAG SENSOR RH RECOGNITION ERROR

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Curtain airbag sensor RH is misinstalled.

• Airbag CM is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

AU:DTC B16F7 CURTAIN AIRBAG SENSOR LH RECOGNITION ERROR

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Curtain airbag sensor LH is misinstalled.

• Airbag CM is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

Step Check Yes No

1 REPLACE CURTAIN AIRBAG SENSOR RH.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Replace the curtain airbag sensor RH with a

genuine sensor. <Ref. to AB-56, REMOVAL,

Curtain Airbag Sensor.>

Does the warning light go off? Finish the diagno-

sis.

Replace the airbag

control module.

<Ref. to AB-48,

REMOVAL, Airbag

Control Module.>

Step Check Yes No

1 REPLACE CURTAIN AIRBAG SENSOR LH.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Replace the curtain airbag sensor LH with a

genuine sensor. <Ref. to AB-56, REMOVAL,

Curtain Airbag Sensor.>

Does the warning light go off? Finish the diagno-

sis.

Replace the airbag

control module.

<Ref. to AB-48,

REMOVAL, Airbag

Control Module.>

15WRX_STI_US_EN.book 65 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-66

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

AV:DTC B1642 SIDE SATELLITE SENSOR BUS RH LOST COMMUNICATION

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Open or short circuit in harness of side sensor bus RH.

• Side airbag sensor RH is faulty.

• Curtain airbag sensor RH is faulty.

• Front door impact sensor RH is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK DTC.

Read the DTC. (Current malfunction)

Is DTC B1622 or B1623 dis-

played?

Perform the diag-

nosis according to

DTC.

Go to step 2.

2 CHECK DTC.

Read the DTC. (Current malfunction)

Is DTC B1632 or B1633 dis-

played?

Perform the diag-

nosis according to

DTC.

Go to step 3.

3 CHECK DTC.

Read the DTC. (Current malfunction)

Is DTC B1692 or B1693 dis-

played?

Perform the diag-

nosis according to

DTC.

Go to step 4.

4 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module and the front

door impact sensor RH.

Is there poor contact? Replace the airbag

rear harness and

the door harness.

Go to step 5.

1524

1514

11 12

AB18

AB63 R124

AB63AB64

AB34

AB33

AB18

AB28

AB34

AB24

AB64

AB24

AB28

AB-03477

AIRBAG CM

CURTAIN

AIRBAG

SENSOR RH

SIDE

AIRBAG

MODULE RH

SIDE

AIRBAG

SENSOR RH

CURTAIN

AIRBAG

MODULE RH

FRONT

DOOR IMPACT

SENSOR RH

15WRX_STI_US_EN.book 66 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-67

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

5 CHECK AIRBAG REAR HARNESS (BE-

TWEEN AIRBAG CONTROL MODULE AND

SIDE AIRBAG SENSOR RH).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB26) from seat

belt pretensioner RH.

3) Disconnect the connector (AB33) from cur-

tain airbag module RH.

4) Disconnect the connector (AB24) of side

airbag module RH.

5) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

6) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

7) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

8) Disconnect the connector (AB28) from side

airbag sensor RH.

9) Connect the connector (2V) in the test har-

ness V to the connector (AB28).

10) Measure the resistance between connector

(5AG) in the test harness AG and connector

(3V) in the test harness V.

Connector & terminal

(5AG) No. 14 — (3V) No. 1:

(5AG) No. 15 — (3V) No. 2:

Is the resistance less than 10

Ω?

Go to step 6. Replace the airbag

rear harness along

with body harness.

6 CHECK AIRBAG REAR HARNESS (BE-

TWEEN AIRBAG CONTROL MODULE AND

SIDE AIRBAG SENSOR RH).

Measure the resistance between connector

(3V) in test harness V and chassis ground, and

the resistance between connector (3V) termi-

nals.

Connector & terminal

(3V) No. 1 — Chassis ground:

(3V) No. 2 — Chassis ground:

(3V) No. 1 — (3V) No. 2:

Is the resistance 1 MΩ or

more?

Go to step 7. Replace the airbag

rear harness along

with body harness.

Step Check Yes No

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AB(diag)-68

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

7 CHECK AIRBAG REAR HARNESS (BE-

TWEEN SIDE AIRBAG SENSOR AND CUR-

TAIN AIRBAG SENSOR RH).

1) Disconnect the connector (2V) in the test

harness V from the connector (AB28) of side

airbag sensor RH.

2) Connect the connector (AB28) of side air-

bag sensor RH and the connector (1AI) in the

test harness AI.

3) Connect the connector (2AI) in the test har-

ness AI and the connector (1V) in the test har-

ness V.

4) Disconnect the connector (AB34) from cur-

tain airbag sensor (RH), and connect the con-

nector (2V) in test harness V to connector

(AB34).

5) Measure the resistance between connector

(3V) terminals in the test harness V.

Connector & terminal

(3V) No. 2 — (3V) No. 6:

(3V) No. 1 — (3V) No. 7:

Is the resistance less than 10

Ω?

Go to step 8. Replace the airbag

rear harness along

with body harness.

8 CHECK AIRBAG REAR HARNESS (BE-

TWEEN SIDE AIRBAG SENSOR AND CUR-

TAIN AIRBAG SENSOR RH).

Measure the resistance between connector

(3V) in test harness V and chassis ground, and

the resistance between connector (3V) termi-

nals in test harness V.

Connector & terminal

(3V) No. 2 — Chassis ground:

(3V) No. 1 — Chassis ground:

(3V) No. 1 — (3V) No. 2:

Is the resistance 1 MΩ or

more?

Go to step 9. Replace the airbag

rear harness along

with body harness.

9 CHECK AIRBAG REAR HARNESS AND

DOOR HARNESS (BETWEEN CURTAIN AIR-

BAG SENSOR RH AND DOOR SENSOR RH).

1) Disconnect the connector (AB64) from the

front door impact sensor RH, and connect the

connector (1H) in the test harness H to connec-

tor (AB64).

2) Measure the resistance between connector

(3V) in the test harness V and connector (3H) in

the test harness H.

Connector & terminal

(3V) No. 4 — (3H) No. 5:

(3V) No. 5 — (3H) No. 6:

Is the resistance less than 10

Ω?

Go to step 10. Check the door

harness, and if any

fault is found,

replace the har-

ness. If there is no

fault, replace the

airbag rear har-

ness together with

body harness.

10 CHECK AIRBAG REAR HARNESS AND

DOOR HARNESS (BETWEEN CURTAIN AIR-

BAG SENSOR RH AND FRONT DOOR IM-

PACT SENSOR RH).

Measure the resistance between connector

(3V) in test harness V and chassis ground, and

the resistance between connector (3V) termi-

nals in test harness V.

Connector & terminal

(3V) No. 4 — Chassis ground:

(3V) No. 5 — Chassis ground:

(3V) No. 4 — (3V) No. 5:

Is the resistance 1 MΩ or

more?

Go to step 11. Check the door

harness, and if any

fault is found,

replace the har-

ness. If there is no

fault, replace the

airbag rear har-

ness together with

body harness.

Step Check Yes No

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AB(diag)-69

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

11 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Go to step 12. Go to step 15.

12 REPLACE SIDE AIRBAG SENSOR RH AND

CHECK AIRBAG CONTROL MODULE AF-

TER REPLACEMENT.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Replace the side airbag sensor RH. <Ref. to

AB-54, REMOVAL, Side Airbag Sensor.>

3) Connect all connectors.

4) Clear the memory.

5) Perform the Inspection Mode.

6) Read the DTC. (Current malfunction)

Is the same DTC displayed? Go to step 13. Go to step 15.

13 REPLACE CURTAIN AIRBAG SENSOR RH

AND CHECK AIRBAG CONTROL MODULE

AFTER REPLACEMENT.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Replace the curtain airbag sensor RH.

<Ref. to AB-56, REMOVAL, Curtain Airbag

Sensor.>

3) Connect all connectors.

4) Clear the memory.

5) Perform the Inspection Mode.

6) Read the DTC. (Current malfunction)

Is the same DTC displayed? Go to step 14. Go to step 15.

14 REPLACE FRONT DOOR IMPACT SENSOR

RH AND CHECK AIRBAG CONTROL MOD-

ULE AFTER REPLACEMENT.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Replace the front door impact sensor RH.

<Ref. to AB-52, REMOVAL, Front Door Impact

Sensor.>

3) Connect all connectors.

4) Clear the memory.

5) Perform the Inspection Mode.

6) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

REMOVAL, Airbag

Control Module.>

Go to step 15.

15 CHECK FOR ANY OTHER DTC ON DISPLAY.

Read the DTC. (Current malfunction)

Is any other DTC displayed? Perform the diag-

nosis according to

DTC.

Finish the diagno-

sis.

Step Check Yes No

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AB(diag)-70

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

AW:DTC B1647 SIDE SATELLITE SENSOR BUS LH LOST COMMUNICATION

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Open or short circuit in harness of side sensor bus LH.

• Side airbag sensor LH is faulty.

• Curtain airbag sensor LH is faulty.

• Front door impact sensor LH is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK DTC.

Read the DTC. (Current malfunction)

Is DTC B1627 or B1628 dis-

played?

Perform the diag-

nosis according to

DTC.

Go to step 2.

2 CHECK DTC.

Read the DTC. (Current malfunction)

Is DTC B1637 or B1638 dis-

played?

Perform the diag-

nosis according to

DTC.

Go to step 3.

3 CHECK DTC.

Read the DTC. (Current malfunction)

Is DTC B1697 or B1698 dis-

played?

Perform the diag-

nosis according to

DTC.

Go to step 4.

4 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module and the front

door impact sensor LH.

Is there poor contact? Replace the airbag

rear harness and

the door harness.

Go to step 5.

AB17

1211

14 15

4251

AB62AB58

AB31

AB23

AB32

AB19

AB62 R123

AB32

AB31

AB17

AB58

AB19

AB23

AB-03478

AIRBAG CM

CURTAIN

AIRBAG

SENSOR LH

SIDE

AIRBAG

MODULE LH

SIDE

AIRBAG

SENSOR LH

CURTAIN

AIRBAG

MODULE LH

FRONT

DOOR IMPACT

SENSOR LH

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AB(diag)-71

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

5 CHECK AIRBAG REAR HARNESS (BE-

TWEEN AIRBAG CONTROL MODULE AND

SIDE AIRBAG SENSOR LH).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB21) from seat

belt pretensioner LH.

3) Disconnect the connector (AB31) from cur-

tain airbag module LH.

4) Disconnect the connector (AB19) of the side

airbag module LH.

5) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

6) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

7) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

8) Disconnect the connector (AB23) from the

side airbag sensor LH.

9) Connect the connector (2V) in the test har-

ness V to the connector (AB23).

10) Measure the resistance between connector

(5AG) in the test harness AG and connector

(3V) in the test harness V.

Connector & terminal

(5AG) No. 10 — (3V) No. 1:

(5AG) No. 9 — (3V) No. 2:

Is the resistance less than 10

Ω?

Go to step 6. Replace the airbag

rear harness along

with body harness.

6 CHECK AIRBAG REAR HARNESS (BE-

TWEEN AIRBAG CONTROL MODULE AND

SIDE AIRBAG SENSOR LH).

Measure the resistance between connector

(3V) in test harness V and chassis ground, and

the resistance between connector (3V) termi-

nals.

Connector & terminal

(3V) No. 1 — Chassis ground:

(3V) No. 2 — Chassis ground:

(3V) No. 1 — (3V) No. 2:

Is the resistance 1 MΩ or

more?

Go to step 7. Replace the airbag

rear harness along

with body harness.

7 CHECK AIRBAG REAR HARNESS (BE-

TWEEN SIDE AIRBAG SENSOR AND CUR-

TAIN AIRBAG SENSOR LH).

1) Disconnect the connector (2V) in the test

harness V from the connector (AB23) of side

airbag sensor LH.

2) Connect the connector (AB23) of side air-

bag sensor LH and the connector (1AI) in the

test harness AI.

3) Connect the connector (2AI) in the test har-

ness AI and the connector (1V) in the test har-

ness V.

4) Disconnect the connector (AB32) from cur-

tain airbag sensor LH, and connect the connec-

tor (2V) in test harness V to connector (AB32).

5) Measure the resistance between connector

(3V) terminals in the test harness V.

Connector & terminal

(3V) No. 2 — (3V) No. 6:

(3V) No. 1 — (3V) No. 7:

Is the resistance less than 10

Ω?

Go to step 8. Replace the airbag

rear harness along

with body harness.

Step Check Yes No

15WRX_STI_US_EN.book 71 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-72

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

8 CHECK AIRBAG REAR HARNESS (BE-

TWEEN SIDE AIRBAG SENSOR AND CUR-

TAIN AIRBAG SENSOR LH).

Measure the resistance between connector

(3V) in test harness V and chassis ground, and

the resistance between connector (3V) termi-

nals in test harness V.

Connector & terminal

(3V) No. 2 — Chassis ground:

(3V) No. 1 — Chassis ground:

(3V) No. 1 — (3V) No. 2:

Is the resistance 1 MΩ or

more?

Go to step 9. Replace the airbag

rear harness along

with body harness.

9 CHECK AIRBAG REAR HARNESS AND

DOOR HARNESS (BETWEEN CURTAIN AIR-

BAG SENSOR LH AND DOOR SENSOR LH).

1) Disconnect the connector (AB58) from the

front door impact sensor LH, and connect the

connector (1H) in the test harness H to connec-

tor (AB58).

2) Measure the resistance between connector

(3V) in the test harness V and connector (3H) in

the test harness H.

Connector & terminal

(3V) No. 4 — (3H) No. 5:

(3V) No. 5 — (3H) No. 6:

Is the resistance less than 10

Ω?

Go to step 10. Check the door

harness, and if any

fault is found,

replace the har-

ness. If there is no

fault, replace the

airbag rear har-

ness together with

body harness.

10 CHECK AIRBAG REAR HARNESS AND

DOOR HARNESS (BETWEEN CURTAIN AIR-

BAG SENSOR LH AND DOOR SENSOR LH).

Measure the resistance between connector

(3V) in test harness V and chassis ground, and

the resistance between connector (3V) termi-

nals in test harness V.

Connector & terminal

(3V) No. 4 — Chassis ground:

(3V) No. 5 — Chassis ground:

(3V) No. 4 — (3V) No. 5:

Is the resistance 1 MΩ or

more?

Go to step 11. Check the door

harness, and if any

fault is found,

replace the har-

ness. If there is no

fault, replace the

airbag rear har-

ness together with

body harness.

11 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Go to step 12. Go to step 15.

12 REPLACE SIDE AIRBAG SENSOR LH AND

CHECK AIRBAG CONTROL MODULE AF-

TER REPLACEMENT.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Replace the side airbag sensor LH. <Ref. to

AB-54, REMOVAL, Side Airbag Sensor.>

3) Connect all connectors.

4) Clear the memory.

5) Perform the Inspection Mode.

6) Read the DTC. (Current malfunction)

Is the same DTC displayed? Go to step 13. Go to step 15.

Step Check Yes No

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AB(diag)-73

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

AX:DTC B1650 OCCUPANT CLASSIFICATION SYSTEM MALFUNCTION

NOTE:

Refer to “Occupant Detection System” for details on DTC B1650. <Ref. to OD(diag)-19, DTC B1650 OCCU-

PANT CLASSIFICATION SYSTEM MALFUNCTION, Diagnostic Procedure with Diagnostic Trouble Code

(DTC).>

AY:DTC B1655 FRONT BUCKLE SWITCH RH FAILURE

NOTE:

Refer to “Occupant Detection System” for details on DTC B1655. <Ref. to OD(diag)-21, DTC B1655 FRONT

BUCKLE SWITCH RH FAILURE, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

13 REPLACE CURTAIN AIRBAG SENSOR LH

AND CHECK AIRBAG CONTROL MODULE

AFTER REPLACEMENT.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Replace the curtain airbag sensor LH. <Ref.

to AB-56, REMOVAL, Curtain Airbag Sensor.>

3) Connect all connectors.

4) Clear the memory.

5) Perform the Inspection Mode.

6) Read the DTC. (Current malfunction)

Is the same DTC displayed? Go to step 14. Go to step 15.

14 REPLACE FRONT DOOR IMPACT SENSOR

LH AND CHECK AIRBAG CONTROL MOD-

ULE AFTER REPLACEMENT.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Replace the front door impact sensor LH.

<Ref. to AB-52, REMOVAL, Front Door Impact

Sensor.>

3) Connect all connectors.

4) Clear the memory.

5) Perform the Inspection Mode.

6) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

REMOVAL, Airbag

Control Module.>

Go to step 15.

15 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Perform the diag-

nosis according to

DTC.

Finish the diagno-

sis.

Step Check Yes No

15WRX_STI_US_EN.book 73 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-74

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

AZ:DTC B1660 PASSENGER’S AIRBAG ON INDICATOR FAILURE

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Passenger’s airbag indicator is faulty.

• Airbag control module is faulty.

• Airbag main harness circuit is open or shorted.

• Body harness circuit is open.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK FOR POOR CONTACT.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Check that the connector between the air-

bag control module and MFD is securely con-

nected.

Is there poor contact of any

connector?

Repair the bulk-

head harness. Or

replace the airbag

main harness

along with body

harness.

Go to step 2.

2 CHECK AIRBAG MAIN HARNESS.

1) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

2) Connect the battery ground terminal and

turn the ignition switch to ON.

NOTE:

Neither of ON/OFF illuminates when it is nor-

mal.

Does the passenger’s airbag

indicator illuminate?

Go to step 3. Go to step 4.

18 19 20

21 22 23 24 25 26 27 28

1234

11 12 13 14 16 1715

29 30

56789

i230

218

14131211

910

AB6

i122

1234

789

11 12

B31

589

AB1

B31

B552

i230

i122

MFD

AB6

AB-03479

AIRBAG CM

PASSENGER'S

AIRBAG ON INDICATOR

PASSENGER'S

AIRBAG OFF INDICATOR

FB-12

F/B FUSE NO. 2

(IG)

15WRX_STI_US_EN.book 74 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-75

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

3 CHECK AIRBAG MAIN HARNESS.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Remove the MFD and disconnect the con-

nector (i122).

3) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

4) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

5) Measure the resistance between connector

(2AG) in the test harness AG and chassis

ground.

Connector & terminal

(2AG) No. 9 — (2AG) No. 8:

(2AG) No. 9 — Chassis ground:

(2AG) No. 8 — Chassis ground:

Is the resistance 1 MΩ or

more?

Replace the MFD.

<Ref. to IDI-20,

REMOVAL, Multi-

function Display

(MFD).>

Repair the bulk-

head harness. Or

replace the airbag

main harness

along with body

harness.

4 CHECK AIRBAG MAIN HARNESS.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connectors (AB6, AB17,

AB18) from the airbag control module, and con-

nect the connector (1AH) in the test harness

AH.

3) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

4) Connect the connectors (7AG) and (8AG) in

the test harness AG.

5) Connect the battery ground terminal and

turn the ignition switch to ON.

Does the passenger’s airbag

indicator illuminate?

Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Go to step 5.

5 CHECK AIRBAG MAIN HARNESS.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Remove the MFD and disconnect the con-

nector (i122).

3) Measure the resistance between connector

(2AG) in the test harness AG and connector

(i122).

Connector & terminal

(2AG) No. 9 — (i122) No. 11:

(2AG) No. 8 — (i122) No. 10:

Is the resistance less than 10

Ω?

Go to step 6. Repair the bulk-

head harness. Or

replace the airbag

main harness

along with body

harness.

6 CHECK BODY HARNESS.

1) Turn the ignition switch to ON.

2) Measure the voltage between connector

(i122) and chassis ground.

Connector & terminal

(i122) No. 3 (+) — Chassis ground (–):

Is the voltage 10 V or more? Replace the MFD.

<Ref. to IDI-20,

REMOVAL, Multi-

function Display

(MFD).>

Check the power

supply circuit of

MFD.

Step Check Yes No

15WRX_STI_US_EN.book 75 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-76

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

BA:DTC B1675 SATELLITE SAFING SENSOR FAILURE

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Satellite safing sensor is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

BB:DTC B1676 LOST COMMUNICATION WITH SATELLITE SAFING SENSOR

NOTE:

For details on DTC B1676, refer to DTC B1677. <Ref. to AB(diag)-77, DTC B1677 SATELLITE SAFING

SENSOR INITIALIZATION INCOMPLETE, Diagnostic Chart with Trouble Code.>

Step Check Yes No

1 REPLACE SATELLITE SAFING SENSOR.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Replace the satellite safing sensor with a

genuine sensor. <Ref. to AB-58, REMOVAL,

Satellite Safing Sensor.>

Does the warning light go off? Finish the diagno-

sis.

Replace the airbag

control module.

<Ref. to AB-48,

REMOVAL, Airbag

Control Module.>

15WRX_STI_US_EN.book 76 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-77

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

BC:DTC B1677 SATELLITE SAFING SENSOR INITIALIZATION INCOMPLETE

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Open or short circuit in harness of satellite safing sensor.

• Satellite safing sensor is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

(AB18, AB41) between the airbag control mod-

ule and the satellite safing sensor.

Is there poor contact? Replace the airbag

rear harness along

with body harness.

Go to step 2.

1524

1514

11 12

AB18

AB-03480

AB41

AB18

SATELLITE SAFING

SENSOR

AIRBAG CM

15WRX_STI_US_EN.book 77 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-78

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

2 CHECK AIRBAG REAR HARNESS (BE-

TWEEN AIRBAG CONTROL MODULE AND

SATELLITE SAFING SENSOR).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connectors (AB21, AB26)

from seat belt pretensioner.

3) Disconnect the connectors (AB31, AB33)

from curtain airbag module.

4) Disconnect connectors (AB19) and (AB24)

from the side airbag module.

5) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

6) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

7) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

8) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

9) Disconnect the connector (AB41) from the

satellite safing sensor and connect to the test

harness H connector (1H).

10) Measure the resistance between connec-

tors (5AG) and (4AG) in the test harness AG

and connector (3H) in the test harness H.

Connector & terminal

(4AG) No. 5 — (3H) No. 5:

(5AG) No. 13 — (3H) No. 6:

Is the resistance less than 10

Ω?

Go to step 3. Replace the airbag

rear harness along

with body harness.

3 CHECK AIRBAG REAR HARNESS (BE-

TWEEN AIRBAG CONTROL MODULE AND

SATELLITE SAFING SENSOR).

Measure the resistance between connector in

the test harness AG and chassis ground, and

the resistance between connector terminals in

the test harness AG.

Connector & terminal

(4AG) No. 5 — Chassis ground:

(5AG) No. 13 — Chassis ground:

(4AG) No. 5 — (5AG) No. 13:

Is the resistance 1 MΩ or

more?

Go to step 4. Replace the airbag

rear harness along

with body harness.

4 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the satel-

lite safing sensor.

<Ref. to AB-58,

REMOVAL, Satel-

lite Safing Sen-

sor.> Replace the

airbag control

module if not oper-

ating normally

even after replac-

ing the sensor.

<Ref. to AB-48,

REMOVAL, Airbag

Control Module.>

Go to step 5.

Step Check Yes No

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AB(diag)-79

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

15WRX_STI_US_EN.book 79 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-80

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

BD:DTC B16F8 SATELLITE SAFING SENSOR RECOGNITION ERROR

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Satellite safing sensor is misinstalled.

• Airbag control module is faulty.

BE:DTC B16F9 DOOR SENSOR RH RECOGNITION ERROR

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Front door impact sensor RH is misinstalled.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

BF:DTC B1690 DOOR SENSOR RH FAILURE

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

Front door impact sensor RH is faulty.

If DTC B1690 is displayed, the circuit within the front door impact sensor RH is faulty.

Replace the front door impact sensor RH. <Ref. to AB-52, REMOVAL, Front Door Impact Sensor.>

BG:DTC B1692 LOST COMMUNICATION WITH DOOR SENSOR RH

NOTE:

For details on DTC B1692, refer to DTC B1693. <Ref. to AB(diag)-81, DTC B1693 DOOR SENSOR RH INI-

TIALIZATION INCOMPLETE, Diagnostic Chart with Trouble Code.>

Step Check Yes No

1 REPLACE SATELLITE SAFING SENSOR.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Replace the satellite safing sensor with a

genuine sensor. <Ref. to AB-58, REMOVAL,

Satellite Safing Sensor.>

Does the warning light go off? Finish the diagno-

sis.

Replace the airbag

control module.

<Ref. to AB-48,

REMOVAL, Airbag

Control Module.>

Step Check Yes No

1 REPLACE FRONT DOOR IMPACT SENSOR

RH.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Replace the front door impact sensor RH

with a genuine sensor. <Ref. to AB-52,

REMOVAL, Front Door Impact Sensor.>

Does the warning light go off? Finish the diagno-

sis.

Replace the airbag

control module.

<Ref. to AB-48,

REMOVAL, Airbag

Control Module.>

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AB(diag)-81

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

BH:DTC B1693 DOOR SENSOR RH INITIALIZATION INCOMPLETE

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Open or short circuit in harness of side sensor bus RH.

• Front door impact sensor RH is faulty.

• Curtain airbag sensor RH is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK DTC.

Read the DTC. (Current malfunction)

Is DTC B1622 or B1623 dis-

played?

Perform the diag-

nosis according to

DTC.

Go to step 2.

2 CHECK DTC.

Read the DTC. (Current malfunction)

Is DTC B1632 or B1633 dis-

played?

Perform the diag-

nosis according to

DTC.

Go to step 3.

3 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module and the front

door impact sensor RH.

Is there poor contact? Replace the airbag

rear harness and

the door harness.

Go to step 4.

1524

1514

11 12

AB18

AB63 R124

AB63AB64

AB34

AB33

AB18

AB28

AB34

AB24

AB64

AB24

AB28

AB-03477

AIRBAG CM

CURTAIN

AIRBAG

SENSOR RH

SIDE

AIRBAG

MODULE RH

SIDE

AIRBAG

SENSOR RH

CURTAIN

AIRBAG

MODULE RH

FRONT

DOOR IMPACT

SENSOR RH

15WRX_STI_US_EN.book 81 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-82

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

4 CHECK AIRBAG REAR HARNESS AND

DOOR HARNESS (BETWEEN CURTAIN AIR-

BAG SENSOR RH AND DOOR SENSOR RH).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB26) from seat

belt pretensioner RH.

3) Disconnect the connector (AB33) from cur-

tain airbag module RH.

4) Disconnect the connector (AB24) from side

airbag module RH.

5) Disconnect the connector (AB34) from cur-

tain airbag sensor (RH), and connect the con-

nector (2V) in test harness V to connector

(AB34).

6) Disconnect the connector (AB64) from the

front door impact sensor RH, and connect the

connector (1H) in the test harness H to connec-

tor (AB64).

7) Measure the resistance between connector

(3V) in the test harness V and connector (3H) in

the test harness H.

Connector & terminal

(3V) No. 4 — (3H) No. 5:

(3V) No. 5 — (3H) No. 6:

Is the resistance less than 10

Ω?

Go to step 5. Check the door

harness, and if any

fault is found,

replace the har-

ness. If there is no

fault, replace the

airbag rear har-

ness together with

body harness.

5 CHECK AIRBAG REAR HARNESS AND

DOOR HARNESS (BETWEEN CURTAIN AIR-

BAG SENSOR RH AND DOOR SENSOR RH).

Measure the resistance between connector

(3V) in test harness V and chassis ground, and

the resistance between connector (3V) termi-

nals in test harness V.

Connector & terminal

(3V) No. 4 — Chassis ground:

(3V) No. 5 — Chassis ground:

(3V) No. 4 — (3V) No. 5:

Is the resistance 1 MΩ or

more?

Go to step 6. Check the door

harness, and if any

fault is found,

replace the har-

ness. If there is no

fault, replace the

airbag rear har-

ness together with

body harness.

6 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Go to step 7. Go to step 9.

7 REPLACE FRONT DOOR IMPACT SENSOR

RH AND CHECK AIRBAG CONTROL MOD-

ULE AFTER REPLACEMENT.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Replace the front door impact sensor RH.

<Ref. to AB-52, REMOVAL, Front Door Impact

Sensor.>

3) Connect all connectors.

4) Clear the memory.

5) Perform the Inspection Mode.

6) Read the DTC. (Current malfunction)

Is the same DTC displayed? Go to step 8. Go to step 9.

Step Check Yes No

15WRX_STI_US_EN.book 82 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-83

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

8 REPLACE CURTAIN AIRBAG SENSOR RH

AND CHECK AIRBAG CONTROL MODULE

AFTER REPLACEMENT.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Replace the curtain airbag sensor RH.

<Ref. to AB-56, REMOVAL, Curtain Airbag

Sensor.>

3) Connect all connectors.

4) Clear the memory.

5) Perform the Inspection Mode.

6) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

REMOVAL, Airbag

Control Module.>

Go to step 9.

9 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code”.

<Ref. to AB(diag)-

33, LIST, List of

Diagnostic Trouble

Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

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AB(diag)-84

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

BI: DTC B16FA LOST COMMUNICATION WITH DOOR SENSOR LH

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Front door impact sensor LH is misinstalled.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

BJ:DTC B1695 DOOR SENSOR LH FAILURE

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

Front door impact sensor LH is faulty.

If DTC AB is displayed, the circuit within the front door impact sensor LH is faulty.

Replace the front door impact sensor LH. <Ref. to AB-52, REMOVAL, Front Door Impact Sensor.>

BK:DTC B1697 LOST COMMUNICATION WITH DOOR SENSOR LH

NOTE:

Refer to DTC B1697 for details on DTC B1698. <Ref. to AB(diag)-85, DTC B1698 DOOR SENSOR LH INI-

TIALIZATION INCOMPLETE, Diagnostic Chart with Trouble Code.>

Step Check Yes No

1 REPLACE FRONT DOOR IMPACT SENSOR

LH.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Replace the front door impact sensor LH

with a genuine sensor. <Ref. to AB-52,

REMOVAL, Front Door Impact Sensor.>

Does the warning light go off? Finish the diagno-

sis.

Replace the airbag

control module.

<Ref. to AB-48,

REMOVAL, Airbag

Control Module.>

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AB(diag)-85

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

BL:DTC B1698 DOOR SENSOR LH INITIALIZATION INCOMPLETE

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Open or short circuit in harness of side sensor bus LH.

• Front door impact sensor LH is faulty.

• Curtain airbag sensor LH is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK DTC.

Read the DTC. (Current malfunction)

Is DTC B1627 or B1628 dis-

played?

Perform the diag-

nosis according to

DTC.

Go to step 2.

2 CHECK DTC.

Read the DTC. (Current malfunction)

Is DTC B1637 or B1638 dis-

played?

Perform the diag-

nosis according to

DTC.

Go to step 3.

3 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module and the front

door impact sensor LH.

Is there poor contact? Replace the airbag

rear harness and

the door harness.

Go to step 4.

AB17

1211

14 15

4251

AB62AB58

AB31

AB23

AB32

AB19

AB62 R123

AB32

AB31

AB17

AB58

AB19

AB23

AB-03478

AIRBAG CM

CURTAIN

AIRBAG

SENSOR LH

SIDE

AIRBAG

MODULE LH

SIDE

AIRBAG

SENSOR LH

CURTAIN

AIRBAG

MODULE LH

FRONT

DOOR IMPACT

SENSOR LH

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AB(diag)-86

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

4 CHECK AIRBAG REAR HARNESS AND

DOOR HARNESS (BETWEEN CURTAIN AIR-

BAG SENSOR LH AND FRONT DOOR IM-

PACT SENSOR LH).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB21) from seat

belt pretensioner LH.

3) Disconnect the connector (AB31) from cur-

tain airbag module LH.

4) Disconnect the connector (AB19) from side

airbag module LH.

5) Disconnect the connector (AB32) from cur-

tain airbag sensor LH, and connect the connec-

tor (2V) in test harness V to connector (AB32).

6) Disconnect the connector (AB58) from the

front door impact sensor LH, and connect the

connector (1H) in the test harness H to connec-

tor (AB58).

7) Measure the resistance between connector

(3V) in the test harness V and connector (3H) in

the test harness H.

Connector & terminal

(3V) No. 4 — (3H) No. 5:

(3V) No. 5 — (3H) No. 6:

Is the resistance less than 10

Ω?

Go to step 5. Check the door

harness, and if any

fault is found,

replace the har-

ness. If there is no

fault, replace the

airbag rear har-

ness together with

body harness.

5 CHECK AIRBAG REAR HARNESS AND

DOOR HARNESS (BETWEEN CURTAIN AIR-

BAG SENSOR LH AND FRONT DOOR IM-

PACT SENSOR LH).

Measure the resistance between connector

(3V) in test harness V and chassis ground, and

the resistance between connector (3V) termi-

nals in test harness V.

Connector & terminal

(3V) No. 4 — Chassis ground:

(3V) No. 5 — Chassis ground:

(3V) No. 4 — (3V) No. 5:

Is the resistance 1 MΩ or

more?

Go to step 6. Check the door

harness, and if any

fault is found,

replace the har-

ness. If there is no

fault, replace the

airbag rear har-

ness together with

body harness.

6 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Go to step 7. Go to step 9.

7 REPLACE FRONT DOOR IMPACT SENSOR

LH AND CHECK AIRBAG CONTROL MOD-

ULE AFTER REPLACEMENT.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Replace the front door impact sensor LH.

<Ref. to AB-52, REMOVAL, Front Door Impact

Sensor.>

3) Connect all connectors.

4) Clear the memory.

5) Perform the Inspection Mode.

6) Read the DTC. (Current malfunction)

Is the same DTC displayed? Go to step 8. Go to step 9.

Step Check Yes No

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AB(diag)-87

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

8 REPLACE CURTAIN AIRBAG SENSOR LH

AND CHECK AIRBAG CONTROL MODULE

AFTER REPLACEMENT.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Replace the curtain airbag sensor LH. <Ref.

to AB-56, REMOVAL, Curtain Airbag Sensor.>

3) Connect all connectors.

4) Clear the memory.

5) Perform the Inspection Mode.

6) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

REMOVAL, Airbag

Control Module.>

Go to step 9.

9 CHECK FOR ANY OTHER DTC ON DISPLAY.

Read the DTC. (Current malfunction)

Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code”.

<Ref. to AB(diag)-

33, LIST, List of

Diagnostic Trouble

Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

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AB(diag)-88

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

BM:DTC B161A LOST COMMUNICATION WITH FRONT SATELLITE SENSOR

BUS

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Harness between airbag control module and front sub sensor is open or shorted.

• Front sub sensor is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module and the front

sub sensor.

Is there poor contact? Replace the airbag

main harness

along with body

harness.

Go to step 2.

AB16

AB13

AB6

1234567

11 12 13 14

15 16 17 18 19 20

21 22 23 24 25 26 27 28 29 30

AB6

AB16

AB13

AB-02835

AIRBAG CM

FRONT SUB

SENSOR LH

FRONT SUB

SENSOR RH

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AB(diag)-89

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

2 CHECK AIRBAG MAIN HARNESS (FRONT

SENSOR BUS LH).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Remove the instrument panel lower cover

and column cover, and disconnect the connec-

tors (AB7) and (AB2).

3) Remove the console front panel and discon-

nect the connector (AB9).

4) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

5) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

6) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

7) Disconnect the connector (AB13) from the

front sub sensor LH, and then connect the con-

nector (1H) in the test harness H to connector

(AB13).

8) Measure the resistance between connector

(4AG) in the test harness AG and connector

(3H) in the test harness H.

Connector & terminal

(4AG) No. 7 — (3H) No. 5:

(4AG) No. 9 — (3H) No. 6:

Is the resistance less than 10

Ω?

Go to step 3. Replace the airbag

main harness

along with body

harness.

3 CHECK AIRBAG MAIN HARNESS (FRONT

SENSOR BUS LH).

Measure the resistance between connector

(4AG) in the test harness AG and chassis

ground, and the resistance between connector

(4AG) terminals in the test harness AG.

Connector & terminal

(4AG) No. 7 — Chassis ground:

(4AG) No. 9 — Chassis ground:

(4AG) No. 7 — (4AG) No. 9:

Is the resistance 1 MΩ or

more?

Go to step 4. Replace the airbag

rear harness along

with body harness.

4 CHECK AIRBAG MAIN HARNESS (FRONT

SENSOR BUS RH).

1) Disconnect the connector (AB16) from the

front sub sensor RH, and then connect the con-

nector (1H) in the test harness H to connector

(AB16).

2) Measure the resistance between connector

(4AG) in the test harness AG and connector

(3H) in the test harness H.

Connector & terminal

(4AG) No. 14 — (3H) No. 5:

(4AG) No. 12 — (3H) No. 6:

Is the resistance less than 10

Ω?

Go to step 5. Replace the airbag

main harness

along with body

harness.

5 CHECK AIRBAG MAIN HARNESS (FRONT

SENSOR BUS RH).

Measure the resistance between connector

(4AG) in the test harness AG and chassis

ground, and the resistance between connector

(4AG) terminals in the test harness AG.

Connector & terminal

(4AG) No. 12 — Chassis ground:

(4AG) No. 14 — Chassis ground:

(4AG) No. 12 — (4AG) No. 14:

Is the resistance 1 MΩ or

more?

Go to step 6. Replace the airbag

rear harness along

with body harness.

Step Check Yes No

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AB(diag)-90

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

6 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the front

sub sensor LH and

front sub sensor

RH. <Ref. to AB-

50, REMOVAL,

Front Sub Sen-

sor.> Replace the

airbag control

module if not oper-

ating normally

even after replac-

ing the sensor.

<Ref. to AB-48,

REMOVAL, Airbag

Control Module.>

Go to step 7.

7 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code”.

<Ref. to AB(diag)-

33, List of Diagnos-

tic Trouble Code

(DTC).>

Finish the diagno-

sis.

Step Check Yes No

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AB(diag)-91

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

BN:DTC B16F1 PASSENGER’S SEAT BELT WARNING FAILURE

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Airbag control module is faulty.

• Meter is faulty.

• Harness circuits between meter and airbag control module are open, shorted or shorted to ground.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK AIRBAG HARNESS.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

3) Connect the battery ground terminal and

turn the ignition switch to ON.

Does the passenger’s seat belt

warning light blink for 6 sec-

onds and go off?

Go to step 3. Go to step 2.

2 CHECK AIRBAG HARNESS.

1) Turn the ignition switch to OFF.

2) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

3) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

4) Measure the resistance between connector

(2AG) in the test harness AG and chassis

ground.

Connector & terminal

(2AG) No. 10 — Chassis ground:

Is the resistance 1 MΩ or

more?

Replace the meter.

<Ref. to IDI-13,

REMOVAL, Com-

bination Meter.>

Repair the bulk-

head harness and

instrument panel

harness. Or

replace the airbag

main harness

along with body

harness.

i10

11 12

7856341

15 1613 14 19

21 22 23 24 26

27 28 29 30 31 32 33 34 35 36 37 38 39 40

i230

218

14131211

910

B31

589

AB6

1234567

11 12 13 14

15 16 17 18 19 20

21 22 23 24 25 26 27 28 29 30

B31

AB1

i10

i230

B552

AB6

AB-03481

AIRBAG CM

COMBINATION METER

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AB(diag)-92

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

BO:DTC B16F0 PASSENGER’S AIRBAG OFF INDICATOR FAILURE

NOTE:

For details on DTC B16F0, refer to DTC B1660. <Ref. to AB(diag)-74, DTC B1660 PASSENGER’S AIRBAG

ON INDICATOR FAILURE, Diagnostic Chart with Trouble Code.>

BP:DTC B1760 SENSOR MAT ABNORMAL

NOTE:

Refer to “Occupant Detection System” for details on DTC B1760. <Ref. to OD(diag)-22, DTC B1760 SEN-

SOR MAT ABNORMAL, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

BQ:DTC B1761 SENSOR MAT LIQUID COATING ABNORMAL

NOTE:

Refer to “Occupant Detection System” for details on DTC B1761. <Ref. to OD(diag)-23, DTC B1761 SEN-

SOR MAT LIQUID COATING ABNORMAL, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

BR:DTC B1771 BUCKLE SWITCH ABNORMAL

NOTE:

Refer to “Occupant Detection System” for details on DTC B1771. <Ref. to OD(diag)-23, DTC B1771 BUCK-

LE SWITCH ABNORMAL, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

BS:DTC B1795 ECU INTERNAL CIRCUIT FAULT

NOTE:

Refer to “Occupant Detection System” for details on DTC B1795. <Ref. to OD(diag)-23, DTC B1795 ECU IN-

TERNAL CIRCUIT FAULT, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

3 CHECK AIRBAG HARNESS.

1) Turn the ignition switch to OFF.

2) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

3) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

4) Connect the connectors (7AG) and (8AG) in

the test harness AG.

5) Turn the ignition switch to ON.

Does the passenger’s seat belt

warning light blink for 6 sec-

onds, then repeatedly light and

go off?

Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Go to step 4.

4 CHECK AIRBAG HARNESS.

1) Turn the ignition switch to OFF.

2) Disconnect the connectors (7AG) and

(8AG) in the test harness AG in the condition of

step 3.

3) Disconnect the connector (i10) from meter.

4) Measure the resistance between connector

(2AG) in the test harness AG and connector

(i84).

Connector & terminal

(2AG) No. 10 — (i10) No. 16:

Is the resistance less than 10

Ω?

Replace the meter.

<Ref. to IDI-13,

REMOVAL, Com-

bination Meter.>

Repair the bulk-

head harness and

instrument panel

harness. Or

replace the airbag

main harness

along with body

harness.

Step Check Yes No

15WRX_STI_US_EN.book 92 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-93

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

BT:DTC B1800 SHORT IN DRIVER’S AIRBAG

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Airbag main harness circuit is shorted.

• Airbag module harness (driver’s side) circuit is shorted.

• Roll connector circuit is shorted.

• Driver’s airbag module is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

NOTE:

Prior to starting work, prepare two AIRBAG RESISTORs (98299PA040).

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module and the

driver’s airbag module.

Is there poor contact? Replace the airbag

harness.

Go to step 2.

2 CHECK DRIVER’S AIRBAG MODULE.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Remove the driver’s airbag module.

3) Connect the connector (1N) in the test har-

ness N to the connector (AB38).

4) Connect the airbag resistor to the connector

(2N) of test harness N.

5) Connect the connector (1Q) in the test har-

ness Q to connector (AB37).

6) Connect the airbag resistor to the connector

(2Q) in the test harness Q.

7) Connect the battery ground terminal and

turn the ignition switch to ON.

Does the airbag warning light

illuminate for six seconds and

go off?

Replace the

driver’s airbag

module. <Ref. to

AB-33, Driver’s Air-

bag Module.>

Go to step 3.

1212

B:A:

AB6

AB2

AB7

AB37

AB38

18 19 20

21 22 23 24 25 26 27 28

1234

11 12 13 14 16 1715

29 30

56789

AB2

AB6

AB37 AB38

AB-03482

ROLL CONNECTOR

DRIVER'S AIRBAG MODULE

AIRBAG CM

15WRX_STI_US_EN.book 93 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-94

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

3 CHECK ROLL CONNECTOR AND AIRBAG

MAIN HARNESS (DRIVER’S AIRBAG HAR-

NESS).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Remove the console front panel and discon-

nect the connector (AB9).

3) Disconnect the driver’s knee airbag module

connector (AB66).

4) Disconnect the airbag resistor from the con-

nector (2N) in test harness N and from the con-

nector (2Q) in test harness Q.

5) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

6) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

7) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

8) Measure the resistance between connector

(2Q) terminals in test harness Q.

Connector & terminal

(2Q) No. 1 — (2Q) No. 2:

Is the resistance 1 MΩ or

more?

Go to step 5. Go to step 4.

4 CHECK AIRBAG MAIN HARNESS (DRIV-

ER’S AIRBAG HARNESS).

1) Remove the instrument panel lower cover

and column cover, and disconnect the connec-

tor (AB7) from (AB2).

2) Measure the resistance between connector

(3AG) terminals in test harness AG.

Connector & terminal

(3AG) No. 1 — (3AG) No. 3:

Is the resistance 1 MΩ or

more?

Replace the roll

connector. <Ref. to

AB-60, Roll Con-

nector.>

Replace the airbag

main harness

along with body

harness.

5 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Go to step 6.

6 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

15WRX_STI_US_EN.book 94 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-95

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

BU:DTC B1801 OPEN IN DRIVER’S AIRBAG

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Airbag main harness circuit is open.

• Airbag module harness (driver’s side) circuit is open.

• Roll connector is open.

• Driver’s airbag module is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

NOTE:

Prior to starting work, prepare two AIRBAG RESISTORs (98299PA040).

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module and the

driver’s airbag module.

Is there poor contact? Replace the airbag

harness.

Go to step 2.

2 CHECK DRIVER’S AIRBAG MODULE.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Remove the driver’s airbag module.

3) Connect the connector (1N) in the test har-

ness N to the connector (AB38).

4) Connect the airbag resistor to the connector

(2N) of test harness N.

5) Connect the connector (1Q) in the test har-

ness Q to connector (AB37).

6) Connect the airbag resistor to the connector

(2Q) in the test harness Q.

7) Connect the battery ground terminal and

turn the ignition switch to ON.

Does the airbag warning light

illuminate for six seconds and

go off?

Replace the

driver’s airbag

module. <Ref. to

AB-33, Driver’s Air-

bag Module.>

Go to step 3.

1212

B:A:

AB6

AB2

AB7

AB37

AB38

18 19 20

21 22 23 24 25 26 27 28

1234

11 12 13 14 16 1715

29 30

56789

AB2

AB6

AB37 AB38

AB-03482

ROLL CONNECTOR

DRIVER'S AIRBAG MODULE

AIRBAG CM

15WRX_STI_US_EN.book 95 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-96

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

3 CHECK ROLL CONNECTOR AND AIRBAG

MAIN HARNESS (DRIVER’S AIRBAG HAR-

NESS).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Remove the console front panel and discon-

nect the connector (AB9).

3) Disconnect the driver’s knee airbag module

connector (AB66).

4) Disconnect the airbag resistor from the con-

nector (2N) in test harness N.

5) Disconnect the airbag resistor from the con-

nector (2Q) of test harness Q.

6) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

7) Measure the resistance between connector

(2Q) terminals in test harness Q.

Connector & terminal

(2Q) No. 1 — (2Q) No. 2:

Is the resistance less than 10

Ω?

Go to step 5. Go to step 4.

4 CHECK ROLL CONNECTOR.

1) Remove the instrument panel lower cover

and column cover, and disconnect the connec-

tor (AB7) from (AB2).

2) Measure the resistance between connector

(2Q) terminals in test harness Q.

Connector & terminal

(2Q) No. 1 — (2Q) No. 2:

Is the resistance less than 10

Ω?

Replace the airbag

main harness

along with body

harness.

Replace the roll

connector. <Ref. to

AB-60, Roll Con-

nector.>

5 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Go to step 6.

6 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

15WRX_STI_US_EN.book 96 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-97

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

BV:DTC B1802 SHORT IN DRIVER’S AIRBAG (TO GROUND)

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Airbag main harness circuit is shorted to ground.

• Airbag module harness (driver’s side) circuit is shorted to ground.

• Roll connector circuit is shorted to ground.

• Driver’s airbag module is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

NOTE:

Prior to starting work, prepare two AIRBAG RESISTORs (98299PA040).

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module and the

driver’s airbag module.

Is there poor contact? Replace the airbag

harness.

Go to step 2.

2 CHECK DRIVER’S AIRBAG MODULE.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Remove the driver’s airbag module.

3) Connect the connector (1N) in the test har-

ness N to the connector (AB38).

4) Connect the airbag resistor to the connector

(2N) of test harness N.

5) Connect the connector (1Q) in the test har-

ness Q to connector (AB37).

6) Connect the airbag resistor to the connector

(2Q) in the test harness Q.

7) Connect the battery ground terminal and

turn the ignition switch to ON.

Does the airbag warning light

illuminate for six seconds and

go off?

Replace the

driver’s airbag

module. <Ref. to

AB-33, Driver’s Air-

bag Module.>

Go to step 3.

1212

B:A:

AB6

AB2

AB7

AB37

AB38

18 19 20

21 22 23 24 25 26 27 28

1234

11 12 13 14 16 1715

29 30

56789

AB2

AB6

AB37 AB38

AB-03482

ROLL CONNECTOR

DRIVER'S AIRBAG MODULE

AIRBAG CM

15WRX_STI_US_EN.book 97 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-98

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

3 CHECK ROLL CONNECTOR.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Remove the instrument panel lower cover

and column cover, and disconnect the connec-

tor (AB7) from (AB2).

3) Disconnect the driver’s knee airbag module

connector (AB66).

4) Disconnect the airbag resistor from the con-

nector (2N) in test harness N and from the con-

nector (2Q) in test harness Q.

5) Measure the resistance between connector

(2Q) in the test harness Q and chassis ground.

Connector & terminal

(2Q) No. 1 — Chassis ground:

(2Q) No. 2 — Chassis ground:

Is the resistance 1 MΩ or

more?

Go to step 4. Replace the roll

connector. <Ref. to

AB-60, Roll Con-

nector.>

4 CHECK AIRBAG MAIN HARNESS (DRIV-

ER’S AIRBAG HARNESS).

1) Disconnect the test harness N from connec-

tor (AB38).

2) Disconnect the test harness Q from connec-

tor (AB37).

3) Remove the console front panel and discon-

nect the connector (AB9).

4) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

5) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

6) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

7) Measure the resistance between connector

(3AG) in the test harness AG and chassis

ground.

Connector & terminal

(3AG) No. 1 — Chassis ground:

(3AG) No. 3 — Chassis ground:

Is the resistance 1 MΩ or

more?

Go to step 5. Replace the airbag

main harness

along with body

harness.

5 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Go to step 6.

6 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

15WRX_STI_US_EN.book 98 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-99

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

BW:DTC B1803 SHORT IN DRIVER’S AIRBAG (TO +B)

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Airbag main harness circuit is shorted to power supply.

• Airbag module harness (driver’s side) circuit is shorted to power supply.

• Roll connector circuit is shorted to power supply.

• Driver’s airbag module is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

NOTE:

Prior to starting work, prepare two AIRBAG RESISTORs (98299PA040).

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module and the

driver’s airbag module.

Is there poor contact? Replace the airbag

harness.

Go to step 2.

2 CHECK DRIVER’S AIRBAG MODULE.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Remove the driver’s airbag module.

3) Connect the connector (1N) in the test har-

ness N to the connector (AB38).

4) Connect the airbag resistor to the connector

(2N) of test harness N.

5) Connect the connector (1Q) in the test har-

ness Q to connector (AB37).

6) Connect the airbag resistor to the connector

(2Q) in the test harness Q.

7) Connect the battery ground terminal and

turn the ignition switch to ON.

Does the airbag warning light

illuminate for six seconds and

go off?

Replace the

driver’s airbag

module. <Ref. to

AB-33, Driver’s Air-

bag Module.>

Go to step 3.

1212

B:A:

AB6

AB2

AB7

AB37

AB38

18 19 20

21 22 23 24 25 26 27 28

1234

11 12 13 14 16 1715

29 30

56789

AB2

AB6

AB37 AB38

AB-03482

ROLL CONNECTOR

DRIVER'S AIRBAG MODULE

AIRBAG CM

15WRX_STI_US_EN.book 99 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-100

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

3 CHECK ROLL CONNECTOR.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Remove the instrument panel lower cover

and column cover, and disconnect the connec-

tor (AB7) from (AB2).

3) Disconnect the driver’s knee airbag module

connector (AB66).

4) Disconnect the airbag resistor from the con-

nector (2N) in test harness N and from the con-

nector (2Q) in test harness Q.

5) Measure the voltage between connector

(2Q) in the test harness Q and chassis ground.

Connector & terminal

(2Q) No. 1 (+) — Chassis ground (–):

(2Q) No. 2 (+) — Chassis ground (–):

Is the voltage less than 1 V? Go to step 4. Replace the roll

connector. <Ref. to

AB-60, Roll Con-

nector.>

4 CHECK AIRBAG MAIN HARNESS (DRIV-

ER’S AIRBAG HARNESS).

1) Disconnect the test harness N from connec-

tor (AB38).

2) Disconnect the test harness Q from connec-

tor (AB37).

3) Remove the console front panel and discon-

nect the connector (AB9).

4) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

5) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

6) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

7) Connect the battery ground terminal and

turn the ignition switch to ON.

8) Measure the voltage between connector

(3AG) in the test harness AG and chassis

ground.

Connector & terminal

(3AG) No. 1 (+) — Chassis ground (–):

(3AG) No. 3 (+) — Chassis ground (–):

Is the voltage less than 1 V? Go to step 5. Replace the airbag

main harness

along with body

harness.

5 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Go to step 6.

6 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

15WRX_STI_US_EN.book 100 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-101

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

BX:DTC B1805 SHORT IN PASSENGER’S AIRBAG

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Airbag main harness circuit is shorted.

• Airbag module harness circuit (passenger’s side) is shorted.

• Passenger’s airbag module is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module and the pas-

senger’s airbag module.

Is there poor contact? Replace the airbag

harness.

Go to step 2.

AB6

18 19 20

21 22 23 24 25 26 27 28

123 5678

11 12 13 14 16 1715

29 30

AB6

AB9

1234

AB-03369

PASSENGER'S AIRBAG MODULE

AIRBAG CM

15WRX_STI_US_EN.book 101 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-102

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

2 CHECK AIRBAG MAIN HARNESS (PASSEN-

GER’S AIRBAG HARNESS).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connectors (AB7) and

(AB2).

3) Disconnect the connector (AB66) from the

driver’s knee airbag module.

4) Disconnect the connectors (AB6, AB17,

AB18) from the airbag control module, connect

the connector (1AH) in the test harness AH, and

release the short mechanism of the connectors

(AB6, AB17, AB18).

5) Disconnect the passenger’s airbag module

connector (AB9).

6) Using a probe, measure the resistance

between the terminals of connector (AB9).

<Ref. to AB(diag)-16, HOW TO USE PROBE,

PREPARATION TOOL, General Description.>

CAUTION:

When measuring the resistance, make sure

that the probe is inserted from the back side

(harness side) of the connector. Also, do not

insert the probe forcibly.

Connector & terminal

(AB9) No. 1 — (AB9) No. 2:

Is the resistance 1 MΩ or

more?

Go to step 3. Replace the airbag

main harness

along with body

harness.

3 CHECK AIRBAG CONTROL MODULE.

1) Disconnect the test harness AG or test har-

ness AH from the connectors (AB6, AB17,

AB18).

2) Connect the connectors (AB6, AB17, AB18)

and the airbag control module.

3) Connect the connectors (AB7) and (AB2).

4) Connect the connector (AB66) to the

driver’s knee airbag module.

5) Connect the battery ground terminal and

turn the ignition switch to ON.

6) Perform the Inspection Mode.

7) Read the DTC. (Current malfunction)

Is DTC B1805 displayed? Replace the airbag

control module.

<Ref. to AB-48,

REMOVAL, Airbag

Control Module.>

Go to step 4.

4 CHECK PASSENGER’S AIRBAG MODULE.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Connect the passenger’s airbag module

connector (AB9).

3) Connect the battery ground terminal and

turn the ignition switch to ON.

4) Perform the Inspection Mode.

5) Read the DTC. (Current malfunction)

Is DTC B1805 displayed? Replace the pas-

senger’s airbag

module. <Ref. to

AB-36, REMOVAL,

Passenger’s Air-

bag Module.>

Go to step 5.

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

15WRX_STI_US_EN.book 102 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-103

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

BY:DTC B1806 OPEN IN PASSENGER’S AIRBAG

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Airbag main harness circuit is open.

• Airbag module harness (passenger’s side) circuit is open.

• Passenger’s airbag module is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module and the pas-

senger’s airbag module.

Is there poor contact? Replace the airbag

harness.

Go to step 2.

AB6

18 19 20

21 22 23 24 25 26 27 28

123 5678

11 12 13 14 16 1715

29 30

AB6

AB9

1234

AB-03369

PASSENGER'S AIRBAG MODULE

AIRBAG CM

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AB(diag)-104

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

2 CHECK AIRBAG MAIN HARNESS (PASSEN-

GER’S AIRBAG HARNESS).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connectors (AB7) and

(AB2).

3) Disconnect the connector (AB66) from the

driver’s knee airbag module.

4) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

5) Disconnect the passenger’s airbag module

connector (AB9).

6) Using a probe, measure the resistance

between the terminals of connector (AB9).

<Ref. to AB(diag)-16, HOW TO USE PROBE,

PREPARATION TOOL, General Description.>

CAUTION:

When measuring the resistance, make sure

that the probe is inserted from the back side

(harness side) of the connector. Also, do not

insert the probe forcibly.

Connector & terminal

(AB9) No. 1 — (AB9) No. 2:

Is the resistance less than 10

Ω?

Go to step 3. Replace the airbag

main harness

along with body

harness.

3 CHECK AIRBAG CONTROL MODULE.

1) Connect the connectors (AB6, AB17, AB18)

and the airbag control module.

2) Connect the connectors (AB7) and (AB2).

3) Connect the connector (AB66) to the

driver’s knee airbag module.

4) Using a probe, short the terminals No. 1 and

No. 2 of connector (AB9). <Ref. to AB(diag)-16,

HOW TO USE PROBE, PREPARATION TOOL,

General Description.>

CAUTION:

When shorting the terminals, make sure that

the probe is inserted from the back side

(harness side) of the connector. Also, do not

insert the probe forcibly.

Connector & terminal

(AB9) No. 1 — (AB9) No. 2:

5) Connect the battery ground terminal and

turn the ignition switch to ON.

6) Perform the Inspection Mode.

7) Read the DTC. (Current malfunction)

Is DTC B1806 displayed? Replace the airbag

control module.

<Ref. to AB-48,

REMOVAL, Airbag

Control Module.>

Go to step 4.

4 CHECK PASSENGER’S AIRBAG MODULE.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Connect the passenger’s airbag module

connector (AB9).

3) Connect the battery negative terminal, and

clear the memory.

4) Perform the Inspection Mode.

5) Read the DTC. (Current malfunction)

Is DTC B1806 displayed? Replace the pas-

senger’s airbag

module. <Ref. to

AB-36, REMOVAL,

Passenger’s Air-

bag Module.>

Go to step 5.

Step Check Yes No

15WRX_STI_US_EN.book 104 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-105

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

15WRX_STI_US_EN.book 105 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-106

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

BZ:DTC B1807 SHORT IN PASSENGER’S AIRBAG (TO GROUND)

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Airbag main harness circuit is shorted to ground.

• Airbag module harness (passenger’s side) circuit is shorted to ground.

• Passenger’s airbag module is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module and the pas-

senger’s airbag module.

Is there poor contact? Replace the airbag

harness.

Go to step 2.

AB6

18 19 20

21 22 23 24 25 26 27 28

123 5678

11 12 13 14 16 1715

29 30

AB6

AB9

1234

AB-03369

PASSENGER'S AIRBAG MODULE

AIRBAG CM

15WRX_STI_US_EN.book 106 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-107

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

2 CHECK AIRBAG MAIN HARNESS (PASSEN-

GER’S AIRBAG HARNESS).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connectors (AB7) and

(AB2).

3) Disconnect the connector (AB66) from the

driver’s knee airbag module.

4) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

5) Disconnect the passenger’s airbag module

connector (AB9).

6) Using a probe, measure the resistance

between the connector (AB9) and chassis

ground. <Ref. to AB(diag)-16, HOW TO USE

PROBE, PREPARATION TOOL, General

Description.>

CAUTION:

When measuring the resistance, make sure

that the probe is inserted from the back side

(harness side) of the connector. Also, do not

insert the probe forcibly.

Connector & terminal

(AB9) No. 1 — Chassis ground:

(AB9) No. 2 — Chassis ground:

Is the resistance 1 MΩ or

more?

Go to step 3. Replace the airbag

main harness

along with body

harness.

3 CHECK AIRBAG CONTROL MODULE.

1) Connect the connectors (AB6, AB17, AB18)

and the airbag control module.

2) Using a probe, short the terminals No. 1 and

No. 2 of connector (AB9). <Ref. to AB(diag)-16,

HOW TO USE PROBE, PREPARATION TOOL,

General Description.>

CAUTION:

When shorting the terminals, make sure that

the probe is inserted from the back side

(harness side) of the connector. Also, do not

insert the probe forcibly.

Connector & terminal

(AB9) No. 1 — (AB9) No. 2:

3) Connect the battery ground terminal and

turn the ignition switch to ON.

4) Perform the Inspection Mode.

5) Read the DTC. (Current malfunction)

Is DTC B1807 displayed? Replace the airbag

control module.

<Ref. to AB-48,

REMOVAL, Airbag

Control Module.>

Go to step 4.

4 CHECK PASSENGER’S AIRBAG MODULE.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Release the short circuit of connector

(AB9).

3) Connect the passenger’s airbag module

connector (AB9).

4) Connect the connectors (AB7) and (AB2).

5) Connect the connector (AB66) to the

driver’s knee airbag module.

6) Connect the battery ground terminal and

turn the ignition switch to ON.

7) Perform the Inspection Mode.

8) Read the DTC. (Current malfunction)

Is DTC B1807 displayed? Replace the pas-

senger’s airbag

module. <Ref. to

AB-36, REMOVAL,

Passenger’s Air-

bag Module.>

Go to step 5.

Step Check Yes No

15WRX_STI_US_EN.book 107 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-108

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

15WRX_STI_US_EN.book 108 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-109

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

CA:DTC B1808 SHORT IN PASSENGER’S AIRBAG (TO +B)

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Airbag main harness circuit is shorted to power supply.

• Airbag module harness (passenger’s side) circuit is shorted to power supply.

• Passenger’s airbag module is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module and the pas-

senger’s airbag module.

Is there poor contact? Replace the airbag

harness.

Go to step 2.

AB6

18 19 20

21 22 23 24 25 26 27 28

123 5678

11 12 13 14 16 1715

29 30

AB6

AB9

1234

AB-03369

PASSENGER'S AIRBAG MODULE

AIRBAG CM

15WRX_STI_US_EN.book 109 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-110

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

2 CHECK AIRBAG MAIN HARNESS (PASSEN-

GER’S AIRBAG HARNESS).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connectors (AB7) and

(AB2).

3) Disconnect the connector (AB66) from the

driver’s knee airbag module.

4) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

5) Disconnect the passenger’s airbag module

connector (AB9).

6) Using a probe, measure the voltage

between the connector (AB9) and chassis

ground. <Ref. to AB(diag)-16, HOW TO USE

PROBE, PREPARATION TOOL, General

Description.>

CAUTION:

When measuring the voltage, make sure

that the probe is inserted from the back side

(harness side) of the connector. Also, do not

insert the probe forcibly.

Connector & terminal

(AB9) No. 1 (+) — Chassis ground (–):

(AB9) No. 2 (+) — Chassis ground (–):

Is the voltage less than 1 V? Go to step 3. Replace the airbag

main harness

along with body

harness.

3 CHECK AIRBAG CONTROL MODULE.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Connect the connectors (AB6, AB17, AB18)

and the airbag control module.

3) Using a probe, short the terminals No. 1 and

No. 2 of connector (AB9). <Ref. to AB(diag)-16,

HOW TO USE PROBE, PREPARATION TOOL,

General Description.>

CAUTION:

When shorting the terminals, make sure that

the probe is inserted from the back side

(harness side) of the connector. Also, do not

insert the probe forcibly.

Connector & terminal

(AB9) No. 1 — (AB9) No. 2:

4) Connect the battery ground terminal and

turn the ignition switch to ON.

5) Perform the Inspection Mode.

6) Read the DTC. (Current malfunction)

Is DTC B1808 displayed? Replace the airbag

control module.

<Ref. to AB-48,

REMOVAL, Airbag

Control Module.>

Go to step 4.

Step Check Yes No

15WRX_STI_US_EN.book 110 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-111

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

4 CHECK PASSENGER’S AIRBAG MODULE.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Release the short circuit of connector

(AB9).

3) Connect the passenger’s airbag module

connector (AB9).

4) Connect the connectors (AB7) and (AB2).

5) Connect the connector (AB66) to the

driver’s knee airbag module.

6) Connect the battery ground terminal and

turn the ignition switch to ON.

7) Perform the Inspection Mode.

8) Read the DTC. (Current malfunction)

Is DTC B1808 displayed? Replace the pas-

senger’s airbag

module. <Ref. to

AB-36, REMOVAL,

Passenger’s Air-

bag Module.>

Go to step 5.

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

15WRX_STI_US_EN.book 111 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-112

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

CB:DTC B1810 SHORT IN DRIVER’S AIRBAG DUAL STAGE - 2ND STEP

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Airbag main harness circuit is shorted.

• Airbag module harness (driver’s side) circuit is shorted.

• Roll connector circuit is shorted.

• Driver’s airbag module is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

NOTE:

Prior to starting work, prepare two AIRBAG RESISTORs (98299PA040).

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module and the

driver’s airbag module.

Is there poor contact? Replace the airbag

harness.

Go to step 2.

2 CHECK DRIVER’S AIRBAG MODULE.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Remove the driver’s airbag module.

3) Connect the connector (1N) in the test har-

ness N to the connector (AB38).

4) Connect the airbag resistor to the connector

(2N) of test harness N.

5) Connect the connector (1Q) in the test har-

ness Q to connector (AB37).

6) Connect the airbag resistor to the connector

(2Q) in the test harness Q.

7) Connect the battery ground terminal and

turn the ignition switch to ON.

Does the airbag warning light

illuminate for six seconds and

go off?

Replace the

driver’s airbag

module. <Ref. to

AB-33, Driver’s Air-

bag Module.>

Go to step 3.

1212

B:A:

AB6

AB2

AB7

AB37

AB38

18 19 20

21 22 23 24 25 26 27 28

1234

11 12 13 14 16 1715

29 30

56789

AB2

AB6

AB37 AB38

AB-03482

ROLL CONNECTOR

DRIVER'S AIRBAG MODULE

AIRBAG CM

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AB(diag)-113

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

3 CHECK ROLL CONNECTOR AND AIRBAG

MAIN HARNESS (DRIVER’S AIRBAG HAR-

NESS).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Remove the console front panel and discon-

nect the connector (AB9).

3) Disconnect the connector (AB66) from the

driver’s knee airbag module.

4) Disconnect the airbag resistor from the con-

nector (2N) in test harness N and from the con-

nector (2Q) in test harness Q.

5) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

6) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

7) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

8) Measure the resistance between connector

(2N) terminals in test harness N.

Connector & terminal

(2N) No. 1 — (2N) No. 2:

Is the resistance 1 MΩ or

more?

Go to step 5. Go to step 4.

4 CHECK AIRBAG MAIN HARNESS (DRIV-

ER’S AIRBAG HARNESS).

1) Remove the instrument panel lower cover

and column cover, and disconnect the connec-

tor (AB7) from (AB2).

2) Disconnect the test harness Q from connec-

tor (AB37).

3) Measure the resistance between connector

(3AG) terminals in test harness AG.

Connector & terminal

(3AG) No. 2 — (3AG) No. 4:

Is the resistance 1 MΩ or

more?

Replace the roll

connector. <Ref. to

AB-60, Roll Con-

nector.>

Replace the airbag

main harness

along with body

harness.

5 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Go to step 6.

6 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

15WRX_STI_US_EN.book 113 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-114

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

CC:DTC B1811 OPEN IN DRIVER’S AIRBAG DUAL STAGE - 2ND STEP

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Airbag main harness circuit is open.

• Airbag module harness (driver’s side) circuit is open.

• Roll connector circuit is open.

• Driver’s airbag module is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

NOTE:

Prior to starting work, prepare two AIRBAG RESISTORs (98299PA040).

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module and the

driver’s airbag module.

Is there poor contact? Replace the airbag

harness.

Go to step 2.

2 CHECK DRIVER’S AIRBAG MODULE.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Remove the driver’s airbag module.

3) Connect the connector (1N) in the test har-

ness N to the connector (AB38).

4) Connect the airbag resistor to the connector

(2N) of test harness N.

5) Connect the connector (1Q) in the test har-

ness Q to connector (AB37).

6) Connect the airbag resistor to the connector

(2Q) in the test harness Q.

7) Connect the battery ground terminal and

turn the ignition switch to ON.

Does the airbag warning light

illuminate for six seconds and

go off?

Replace the

driver’s airbag

module. <Ref. to

AB-33, Driver’s Air-

bag Module.>

Go to step 3.

1212

B:A:

AB6

AB2

AB7

AB37

AB38

18 19 20

21 22 23 24 25 26 27 28

1234

11 12 13 14 16 1715

29 30

56789

AB2

AB6

AB37 AB38

AB-03482

ROLL CONNECTOR

DRIVER'S AIRBAG MODULE

AIRBAG CM

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AB(diag)-115

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

3 CHECK ROLL CONNECTOR AND AIRBAG

MAIN HARNESS (DRIVER’S AIRBAG HAR-

NESS).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Remove the console front panel and discon-

nect the connector (AB9).

3) Disconnect the connector (AB66) from the

driver’s knee airbag module.

4) Disconnect the airbag resistor from the con-

nector (2N) in test harness N.

5) Disconnect the airbag resistor from the con-

nector (2Q) of test harness Q.

6) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

7) Measure the resistance between connector

(2N) terminals in test harness N.

Connector & terminal

(2N) No. 1 — (2N) No. 2:

Is the resistance less than 10

Ω?

Go to step 5. Go to step 4.

4 CHECK ROLL CONNECTOR.

1) Remove the instrument panel lower cover

and column cover, and disconnect the connec-

tor (AB7) from (AB2).

2) Measure the resistance between connector

(2N) terminals in test harness N.

Connector & terminal

(2N) No. 1 — (2N) No. 2:

Is the resistance less than 10

Ω?

Replace the airbag

main harness

along with body

harness.

Replace the roll

connector. <Ref. to

AB-60, Roll Con-

nector.>

5 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Go to step 6.

6 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

15WRX_STI_US_EN.book 115 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-116

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

CD:DTC B1812 SHORT IN DRIVER’S AIRBAG DUAL STAGE - 2ND STEP (TO

GROUND)

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Airbag main harness circuit is shorted to ground.

• Airbag module harness (driver’s side) circuit is shorted to ground.

• Roll connector circuit is shorted to ground.

• Driver’s airbag module is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

NOTE:

Prior to starting work, prepare two AIRBAG RESISTORs (98299PA040).

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module and the

driver’s airbag module.

Is there poor contact? Replace the airbag

harness.

Go to step 2.

1212

B:A:

AB6

AB2

AB7

AB37

AB38

18 19 20

21 22 23 24 25 26 27 28

1234

11 12 13 14 16 1715

29 30

56789

AB2

AB6

AB37 AB38

AB-03482

ROLL CONNECTOR

DRIVER'S AIRBAG MODULE

AIRBAG CM

15WRX_STI_US_EN.book 116 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-117

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

2 CHECK DRIVER’S AIRBAG MODULE.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Remove the driver’s airbag module.

3) Connect the connector (1N) in the test har-

ness N to the connector (AB38).

4) Connect the airbag resistor to the connector

(2N) of test harness N.

5) Connect the connector (1Q) in the test har-

ness Q to connector (AB37).

6) Connect the airbag resistor to the connector

(2Q) in the test harness Q.

7) Connect the battery ground terminal and

turn the ignition switch to ON.

Does the airbag warning light

illuminate for six seconds and

go off?

Replace the

driver’s airbag

module. <Ref. to

AB-33, Driver’s Air-

bag Module.>

Go to step 3.

3 CHECK ROLL CONNECTOR.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Remove the instrument panel lower cover

and column cover, and disconnect the connec-

tor (AB7) from (AB2).

3) Disconnect the connector (AB66) from the

driver’s knee airbag module.

4) Disconnect the airbag resistor from the con-

nector (2N) in test harness N and from the con-

nector (2Q) in test harness Q.

5) Measure the resistance between connector

(2N) in the test harness N and chassis ground.

Connector & terminal

(2N) No. 1 — Chassis ground:

(2N) No. 2 — Chassis ground:

Is the resistance 1 MΩ or

more?

Go to step 4. Replace the roll

connector. <Ref. to

AB-60, Roll Con-

nector.>

4 CHECK AIRBAG MAIN HARNESS (DRIV-

ER’S AIRBAG HARNESS).

1) Disconnect the test harness N from connec-

tor (AB38).

2) Disconnect the test harness Q from connec-

tor (AB37).

3) Remove the console front panel and discon-

nect the connector (AB9).

4) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

5) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

6) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

7) Measure the resistance between connector

(3AG) in the test harness AG and chassis

ground.

Connector & terminal

(3AG) No. 2 — Chassis ground:

(3AG) No. 4 — Chassis ground:

Is the resistance 1 MΩ or

more?

Go to step 5. Replace the airbag

main harness

along with body

harness.

5 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Go to step 6.

Step Check Yes No

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AB(diag)-118

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

6 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

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AB(diag)-119

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

CE:DTC B1813 SHORT IN DRIVER’S AIRBAG DUAL STAGE - 2ND STEP CIR-

CUIT (TO +B)

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Airbag main harness circuit is shorted to power supply.

• Airbag module harness (driver’s side) circuit is shorted to power supply.

• Roll connector is shorted to power supply.

• Driver’s airbag module is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

NOTE:

Prior to starting work, prepare two AIRBAG RESISTORs (98299PA040).

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module and the

driver’s airbag module.

Is there poor contact? Replace the airbag

harness.

Go to step 2.

1212

B:A:

AB6

AB2

AB7

AB37

AB38

18 19 20

21 22 23 24 25 26 27 28

1234

11 12 13 14 16 1715

29 30

56789

AB2

AB6

AB37 AB38

AB-03482

ROLL CONNECTOR

DRIVER'S AIRBAG MODULE

AIRBAG CM

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AB(diag)-120

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

2 CHECK DRIVER’S AIRBAG MODULE.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Remove the driver’s airbag module.

3) Connect the connector (1N) in the test har-

ness N to the connector (AB38).

4) Connect the airbag resistor to the connector

(2N) of test harness N.

5) Connect the connector (1Q) in the test har-

ness Q to connector (AB37).

6) Connect the airbag resistor to the connector

(2Q) in the test harness Q.

7) Connect the battery ground terminal and

turn the ignition switch to ON.

Does the airbag warning light

illuminate for six seconds and

go off?

Replace the

driver’s airbag

module. <Ref. to

AB-33, Driver’s Air-

bag Module.>

Go to step 3.

3 CHECK ROLL CONNECTOR.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Remove the instrument panel lower cover

and column cover, and disconnect the connec-

tor (AB7) from (AB2).

3) Disconnect the connector (AB66) from the

driver’s knee airbag module.

4) Disconnect the airbag resistor from the con-

nector (2N) in test harness N and from the con-

nector (2Q) in test harness Q.

5) Measure the voltage between connector

(2N) in the test harness N and chassis ground.

Connector & terminal

(2N) No. 1 (+) — Chassis ground (–):

(2N) No. 2 (+) — Chassis ground (–):

Is the voltage less than 1 V? Go to step 4. Replace the roll

connector. <Ref. to

AB-60, Roll Con-

nector.>

4 CHECK AIRBAG MAIN HARNESS (DRIV-

ER’S AIRBAG HARNESS).

1) Disconnect the test harness N from connec-

tor (AB38).

2) Disconnect the test harness Q from connec-

tor (AB37).

3) Remove the console front panel and discon-

nect the connector (AB9).

4) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

5) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

6) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

7) Measure the voltage between connector

(3AG) in the test harness AG and chassis

ground.

Connector & terminal

(3AG) No. 2 (+) — Chassis ground (–):

(3AG) No. 4 (+) — Chassis ground (–):

Is the voltage less than 1 V? Go to step 5. Replace the airbag

main harness

along with body

harness.

5 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Go to step 6.

Step Check Yes No

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AB(diag)-121

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

6 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

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AB(diag)-122

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

CF:DTC B1815 OPEN IN PASSENGER’S AIRBAG DUAL STAGE - 2ND STEP

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Airbag main harness circuit is shorted.

• Airbag module harness circuit (passenger’s side) is shorted.

• Passenger’s airbag module is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module and the pas-

senger’s airbag module.

Is there poor contact? Replace the airbag

harness.

Go to step 2.

AB6

18 19 20

21 22 23 24 25 26 27 28

123 5678

11 12 13 14 16 1715

29 30

AB6

AB9

1234

AB-03369

PASSENGER'S AIRBAG MODULE

AIRBAG CM

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AB(diag)-123

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

2 CHECK AIRBAG MAIN HARNESS (PASSEN-

GER’S AIRBAG HARNESS).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connectors (AB7) and

(AB2).

3) Disconnect the connector (AB66) from the

driver’s knee airbag module.

4) Disconnect the connectors (AB6, AB17,

AB18) from the airbag control module, connect

the connector (1AH) in the test harness AH, and

release the short mechanism of the connectors

(AB6, AB17, AB18).

5) Disconnect the passenger’s airbag module

connector (AB9).

6) Using a probe, measure the resistance

between the terminals of connector (AB9).

<Ref. to AB(diag)-16, HOW TO USE PROBE,

PREPARATION TOOL, General Description.>

CAUTION:

When measuring the resistance, make sure

that the probe is inserted from the back side

(harness side) of the connector. Also, do not

insert the probe forcibly.

Connector & terminal

(AB9) No. 3 — (AB9) No. 4:

Is the resistance 1 MΩ or

more?

Go to step 3. Replace the airbag

main harness

along with body

harness.

3 CHECK AIRBAG CONTROL MODULE.

1) Disconnect the test harness AG and test

harness AH from the connectors (AB6, AB17,

AB18).

2) Connect the connectors (AB6, AB17, AB18)

and the airbag control module.

3) Connect the connectors (AB7) and (AB2).

4) Connect the connector (AB66) to the

driver’s knee airbag module.

5) Connect the battery ground terminal and

turn the ignition switch to ON.

6) Perform the Inspection Mode.

7) Read the DTC. (Current malfunction)

Is DTC B1815 displayed? Replace the airbag

control module.

<Ref. to AB-48,

REMOVAL, Airbag

Control Module.>

Go to step 4.

4 CHECK PASSENGER’S AIRBAG MODULE.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Connect the passenger’s airbag module

connector (AB9).

3) Connect the battery ground terminal and

turn the ignition switch to ON.

4) Perform the Inspection Mode.

5) Read the DTC. (Current malfunction)

Is DTC B1815 displayed? Replace the pas-

senger’s airbag

module. <Ref. to

AB-36, REMOVAL,

Passenger’s Air-

bag Module.>

Go to step 5.

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

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AB(diag)-124

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

CG:DTC B1816 OPEN IN PASSENGER’S AIRBAG DUAL STAGE - 2ND STEP

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Airbag main harness circuit is open.

• Airbag module harness (passenger’s side) circuit is open.

• Passenger’s airbag module is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module and the pas-

senger’s airbag module.

Is there poor contact? Replace the airbag

harness.

Go to step 2.

AB6

18 19 20

21 22 23 24 25 26 27 28

123 5678

11 12 13 14 16 1715

29 30

AB6

AB9

1234

AB-03369

PASSENGER'S AIRBAG MODULE

AIRBAG CM

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AB(diag)-125

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

2 CHECK AIRBAG MAIN HARNESS (PASSEN-

GER’S AIRBAG HARNESS).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connectors (AB7) and

(AB2).

3) Disconnect the connector (AB66) from the

driver’s knee airbag module.

4) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

5) Disconnect the passenger’s airbag module

connector (AB9).

6) Using a probe, measure the resistance

between the terminals of connector (AB9).

<Ref. to AB(diag)-16, HOW TO USE PROBE,

PREPARATION TOOL, General Description.>

CAUTION:

When measuring the resistance, make sure

that the probe is inserted from the back side

(harness side) of the connector. Also, do not

insert the probe forcibly.

Connector & terminal

(AB9) No. 3 — (AB9) No. 4:

Is the resistance less than 10

Ω?

Go to step 3. Replace the airbag

main harness

along with body

harness.

3 CHECK AIRBAG CONTROL MODULE.

1) Connect the connectors (AB6, AB17, AB18)

and the airbag control module.

2) Connect the connectors (AB7) and (AB2).

3) Connect the connector (AB66) to the

driver’s knee airbag module.

4) Using a probe, short the terminals No. 3 and

No. 4 of connector (AB9). <Ref. to AB(diag)-16,

HOW TO USE PROBE, PREPARATION TOOL,

General Description.>

CAUTION:

When shorting the terminals, make sure that

the probe is inserted from the back side

(harness side) of the connector. Also, do not

insert the probe forcibly.

Connector & terminal

(AB9) No. 3 — (AB9) No. 4:

5) Connect the battery ground terminal and

turn the ignition switch to ON.

6) Perform the Inspection Mode.

7) Read the DTC. (Current malfunction)

Is DTC B1816 displayed? Replace the airbag

control module.

<Ref. to AB-48,

REMOVAL, Airbag

Control Module.>

Go to step 4.

4 CHECK PASSENGER’S AIRBAG MODULE.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Connect the passenger’s airbag module

connector (AB9).

3) Connect the battery ground terminal and

turn the ignition switch to ON.

4) Perform the Inspection Mode.

5) Read the DTC. (Current malfunction)

Is DTC B1816 displayed? Replace the pas-

senger’s airbag

module. <Ref. to

AB-36, REMOVAL,

Passenger’s Air-

bag Module.>

Go to step 5.

Step Check Yes No

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AB(diag)-126

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

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AB(diag)-127

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

CH:DTC B1817 SHORT IN PASSENGER’S AIRBAG DUAL STAGE - 2ND STEP

(TO GROUND)

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Airbag main harness circuit is shorted to ground.

• Airbag module harness (passenger’s side) circuit is shorted to ground.

• Passenger’s airbag module is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module and the pas-

senger’s airbag module.

Is there poor contact? Replace the airbag

harness.

Go to step 2.

AB6

18 19 20

21 22 23 24 25 26 27 28

123 5678

11 12 13 14 16 1715

29 30

AB6

AB9

1234

AB-03369

PASSENGER'S AIRBAG MODULE

AIRBAG CM

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AB(diag)-128

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

2 CHECK AIRBAG MAIN HARNESS (PASSEN-

GER’S AIRBAG HARNESS).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connectors (AB7) and

(AB2).

3) Disconnect the connector (AB66) from the

driver’s knee airbag module.

4) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

5) Disconnect the passenger’s airbag module

connector (AB9).

6) Using a probe, measure the resistance

between the connector (AB9) and chassis

ground. <Ref. to AB(diag)-16, HOW TO USE

PROBE, PREPARATION TOOL, General

Description.>

CAUTION:

When measuring the resistance, make sure

that the probe is inserted from the back side

(harness side) of the connector. Also, do not

insert the probe forcibly.

Connector & terminal

(AB9) No. 3 — Chassis ground:

(AB9) No. 4 — Chassis ground:

Is the resistance 1 MΩ or

more?

Go to step 3. Replace the airbag

main harness

along with body

harness.

3 CHECK AIRBAG CONTROL MODULE.

1) Connect the connectors (AB6, AB17, AB18)

and the airbag control module.

2) Using a probe, short the terminals No. 3 and

No. 4 of connector (AB9). <Ref. to AB(diag)-16,

HOW TO USE PROBE, PREPARATION TOOL,

General Description.>

CAUTION:

When shorting the terminals, make sure that

the probe is inserted from the back side

(harness side) of the connector. Also, do not

insert the probe forcibly.

Connector & terminal

(AB9) No. 3 — (AB9) No. 4:

3) Connect the battery ground terminal and

turn the ignition switch to ON.

4) Perform the Inspection Mode.

5) Read the DTC. (Current malfunction)

Is DTC B1817 displayed? Replace the airbag

control module.

<Ref. to AB-48,

REMOVAL, Airbag

Control Module.>

Go to step 4.

4 CHECK PASSENGER’S AIRBAG MODULE.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Release the short circuit of connector

(AB9).

3) Connect the passenger’s airbag module

connector (AB9).

4) Connect the connectors (AB7) and (AB2).

5) Connect the connector (AB66) to the

driver’s knee airbag module.

6) Connect the battery ground terminal and

turn the ignition switch to ON.

7) Perform the Inspection Mode.

8) Read the DTC. (Current malfunction)

Is DTC B1817 displayed? Replace the pas-

senger’s airbag

module. <Ref. to

AB-36, REMOVAL,

Passenger’s Air-

bag Module.>

Go to step 5.

Step Check Yes No

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AB(diag)-129

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

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AB(diag)-130

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

CI: DTC B1818 SHORT IN PASSENGER’S AIRBAG DUAL STAGE - 2ND STEP

CIRCUIT (TO +B)

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Airbag main harness circuit is shorted to power supply.

• Airbag module harness (passenger’s side) circuit is shorted to power supply.

• Passenger’s airbag module is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module and the pas-

senger’s airbag module.

Is there poor contact? Replace the airbag

harness.

Go to step 2.

AB6

18 19 20

21 22 23 24 25 26 27 28

123 5678

11 12 13 14 16 1715

29 30

AB6

AB9

1234

AB-03369

PASSENGER'S AIRBAG MODULE

AIRBAG CM

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AB(diag)-131

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

2 CHECK AIRBAG MAIN HARNESS (PASSEN-

GER’S AIRBAG HARNESS).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connectors (AB7) and

(AB2).

3) Disconnect the connector (AB66) from the

driver’s knee airbag module.

4) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

5) Disconnect the passenger’s airbag module

connector (AB9).

6) Using a probe, measure the voltage

between the connector (AB9) and chassis

ground. <Ref. to AB(diag)-16, HOW TO USE

PROBE, PREPARATION TOOL, General

Description.>

CAUTION:

When measuring the voltage, make sure

that the probe is inserted from the back side

(harness side) of the connector. Also, do not

insert the probe forcibly.

Connector & terminal

(AB9) No. 3 (+) — Chassis ground (–):

(AB9) No. 4 (+) — Chassis ground (–):

Is the voltage less than 1 V? Go to step 3. Replace the airbag

main harness

along with body

harness.

3 CHECK AIRBAG CONTROL MODULE.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Connect the connectors (AB6, AB17, AB18)

and the airbag control module.

3) Using a probe, short the terminals No. 3 and

No. 4 of connector (AB9). <Ref. to AB(diag)-16,

HOW TO USE PROBE, PREPARATION TOOL,

General Description.>

CAUTION:

When shorting the terminals, make sure that

the probe is inserted from the back side

(harness side) of the connector. Also, do not

insert the probe forcibly.

Connector & terminal

(AB9) No. 3 — (AB9) No. 4:

4) Connect the battery ground terminal and

turn the ignition switch to ON.

5) Perform the Inspection Mode.

6) Read the DTC. (Current malfunction)

Is DTC B1818 displayed? Replace the airbag

control module.

<Ref. to AB-48,

REMOVAL, Airbag

Control Module.>

Go to step 4.

Step Check Yes No

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AB(diag)-132

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

4 CHECK PASSENGER’S AIRBAG MODULE.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Release the short circuit of connector

(AB9).

3) Connect the passenger’s airbag module

connector (AB9).

4) Connect the connectors (AB7) and (AB2).

5) Connect the connector (AB66) to the

driver’s knee airbag module.

6) Connect the battery ground terminal and

turn the ignition switch to ON.

7) Perform the Inspection Mode.

8) Read the DTC. (Current malfunction)

Is DTC B1818 displayed? Replace the pas-

senger’s airbag

module. <Ref. to

AB-36, REMOVAL,

Passenger’s Air-

bag Module.>

Go to step 5.

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

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AB(diag)-133

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

CJ:DTC B1820 SHORT IN SIDE AIRBAG RH

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Side airbag harness RH circuit is shorted.

• Side airbag module RH is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module, side airbag

module RH and the side airbag sensor RH.

Is there poor contact? Replace the airbag

rear harness along

with body harness.

Go to step 2.

2 CHECK SIDE AIRBAG MODULE.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB24) from the

side airbag module RH, and connect the con-

nector (1AJ) in the test harness AJ to connector

(AB24).

3) Connect the airbag resistor to the test har-

ness AJ connector (3AJ).

4) Connect the battery ground terminal and

turn the ignition switch to ON.

Does the airbag warning light

illuminate for 6 seconds and go

off?

Replace the side

airbag module RH.

<Ref. to AB-43,

REMOVAL, Side

Airbag Module.>

Go to step 3.

1524

1514

11 12

AB18

AB63 R124

AB63AB64

AB34

AB18

AB28

AB34

AB24

AB64

AB24

AB28

AB-03483

AIRBAG CM

CURTAIN AIRBAG

SENSOR RH

SIDE AIRBAG

MODULE RH

SIDE AIRBAG

SENSOR RH

FRONT DOOR

IMPACT SENSOR RH

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AB(diag)-134

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

3 CHECK AIRBAG REAR HARNESS (SIDE

AIRBAG MODULE HARNESS RH).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB26) from seat

belt pretensioner RH.

3) Disconnect the connector (AB33) from cur-

tain airbag module RH.

4) Disconnect the airbag resistor from test har-

ness AJ.

5) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

6) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

7) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

8) Measure the resistance between connector

(3AJ) in the test harness AJ and chassis

ground.

Connector & terminal

(3AJ) No. 1 — (3AJ) No. 2:

Is the resistance 1 MΩ or

more?

Go to step 4. Replace the airbag

rear harness along

with body harness.

4 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Go to step 5.

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

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AB(diag)-135

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

CK:DTC B1821 OPEN IN SIDE AIRBAG RH

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Side airbag harness RH circuit is open.

• Side airbag module RH is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module, side airbag

module RH and the side airbag sensor RH.

Is there poor contact? Replace the airbag

rear harness along

with body harness.

Go to step 2.

2 CHECK SIDE AIRBAG MODULE.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB24) from the

side airbag module RH, and connect the con-

nector (1AJ) in the test harness AJ to connector

(AB24).

3) Connect the airbag resistor to the test har-

ness AJ connector (3AJ).

4) Connect the battery ground terminal and

turn the ignition switch to ON.

Does the airbag warning light

illuminate for 6 seconds and go

off?

Replace the side

airbag module RH.

<Ref. to AB-43,

REMOVAL, Side

Airbag Module.>

Go to step 3.

1524

1514

11 12

AB18

AB63 R124

AB63AB64

AB34

AB18

AB28

AB34

AB24

AB64

AB24

AB28

AB-03483

AIRBAG CM

CURTAIN AIRBAG

SENSOR RH

SIDE AIRBAG

MODULE RH

SIDE AIRBAG

SENSOR RH

FRONT DOOR

IMPACT SENSOR RH

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AB(diag)-136

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

3 CHECK AIRBAG REAR HARNESS (SIDE

AIRBAG MODULE HARNESS RH).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB26) from seat

belt pretensioner RH.

3) Disconnect the connector (AB33) from cur-

tain airbag module RH.

4) Disconnect the airbag resistor from test har-

ness AJ.

5) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

6) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

7) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

8) Measure the resistance between connector

in the test harness AG and connector in the test

harness AJ.

Connector & terminal

(4AG) No. 11 — (3AJ) No. 1:

(4AG) No. 13 — (3AJ) No. 2:

Is the resistance less than 10

Ω?

Go to step 4. Replace the airbag

rear harness along

with body harness.

4 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Go to step 5.

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

15WRX_STI_US_EN.book 136 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-137

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

CL:DTC B1822 SHORT IN SIDE AIRBAG RH (TO GROUND)

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Side airbag harness RH circuit is shorted to ground.

• Side airbag module RH is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module, side airbag

module RH and the side airbag sensor RH.

Is there poor contact? Replace the airbag

rear harness along

with body harness.

Go to step 2.

2 CHECK SIDE AIRBAG MODULE.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB24), and con-

nect the connector (1AJ) in test harness AJ to

connector (AB24).

3) Connect the airbag resistor to the test har-

ness AJ connector (3AJ).

4) Connect the battery ground terminal and

turn the ignition switch to ON.

Does the airbag warning light

illuminate for six seconds and

go off?

Replace the side

airbag module RH.

<Ref. to AB-43,

REMOVAL, Side

Airbag Module.>

Go to step 3.

1524

1514

11 12

AB18

AB63 R124

AB63AB64

AB34

AB18

AB28

AB34

AB24

AB64

AB24

AB28

AB-03483

AIRBAG CM

CURTAIN AIRBAG

SENSOR RH

SIDE AIRBAG

MODULE RH

SIDE AIRBAG

SENSOR RH

FRONT DOOR

IMPACT SENSOR RH

15WRX_STI_US_EN.book 137 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-138

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

3 CHECK AIRBAG REAR HARNESS (SIDE

AIRBAG MODULE HARNESS RH).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB26) from seat

belt pretensioner RH.

3) Disconnect the connector (AB33) from cur-

tain airbag module RH.

4) Disconnect the airbag resistor from test har-

ness AJ.

5) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

6) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

7) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

8) Measure the resistance between connector

(3AJ) in the test harness AJ and chassis

ground.

Connector & terminal

(3AJ) No. 1 — Chassis ground:

(3AJ) No. 2 — Chassis ground:

Is the resistance 1 MΩ or

more?

Go to step 4. Replace the airbag

rear harness along

with body harness.

4 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Go to step 5.

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

15WRX_STI_US_EN.book 138 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-139

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

CM:DTC B1823 SHORT IN SIDE AIRBAG RH (TO +B)

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Side airbag harness RH is shorted to power supply.

• Side airbag module RH is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module, side airbag

module RH and the side airbag sensor RH.

Is there poor contact? Replace the airbag

rear harness along

with body harness.

Go to step 2.

2 CHECK SIDE AIRBAG MODULE.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB24), and con-

nect the connector (1AJ) in test harness AJ to

connector (AB24).

3) Connect the airbag resistor to the test har-

ness AJ connector (3AJ).

4) Connect the battery ground terminal and

turn the ignition switch to ON.

Does the airbag warning light

illuminate for six seconds and

go off?

Replace the side

airbag module RH.

<Ref. to AB-43,

REMOVAL, Side

Airbag Module.>

Go to step 3.

1524

1514

11 12

AB18

AB63 R124

AB63AB64

AB34

AB18

AB28

AB34

AB24

AB64

AB24

AB28

AB-03483

AIRBAG CM

CURTAIN AIRBAG

SENSOR RH

SIDE AIRBAG

MODULE RH

SIDE AIRBAG

SENSOR RH

FRONT DOOR

IMPACT SENSOR RH

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AB(diag)-140

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

3 CHECK AIRBAG REAR HARNESS (SIDE

AIRBAG MODULE HARNESS RH).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB26) from seat

belt pretensioner RH.

3) Disconnect the connector (AB33) from cur-

tain airbag module RH.

4) Disconnect the airbag resistor from test har-

ness.

5) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

6) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

7) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

8) Connect the battery ground terminal and

turn the ignition switch to ON.

9) Measure the voltage between connector

(3AJ) in the test harness AJ and chassis

ground.

Connector & terminal

(3AJ) No. 1 (+) — Chassis ground (–):

(3AJ) No. 2 (+) — Chassis ground (–):

Is the voltage less than 1 V? Go to step 4. Replace the airbag

rear harness along

with body harness.

4 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Go to step 5.

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

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AB(diag)-141

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

CN:DTC B1825 SHORT IN SIDE AIRBAG LH

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Side airbag harness LH circuit is shorted.

• Side airbag module LH is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module, side airbag

module LH and the side airbag sensor LH.

Is there poor contact? Replace the airbag

rear harness along

with body harness.

Go to step 2.

2 CHECK SIDE AIRBAG MODULE.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB19) from the

side airbag module LH, and connect the con-

nector (1AJ) in test harness AJ to the connector

(AB19).

3) Connect the airbag resistor to the test har-

ness AJ connector (3AJ).

4) Connect the battery ground terminal and

turn the ignition switch to ON.

Does the airbag warning light

illuminate for 6 seconds and go

off?

Replace the side

airbag module LH.

<Ref. to AB-43,

REMOVAL, Side

Airbag Module.>

Go to step 3.

AB17

1211

14 15

4251

AB62AB58

AB23

AB32

AB19

AB62 R123

AB32

AB17

AB58

AB19

AB23

AB-03484

AIRBAG CM

CURTAIN AIRBAG

SENSOR LH

SIDE AIRBAG

MODULE LH

SIDE AIRBAG

SENSOR LH

FRONT DOOR

IMPACT SENSOR LH

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AB(diag)-142

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

3 CHECK AIRBAG REAR HARNESS (SIDE

AIRBAG MODULE HARNESS LH).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB21) from seat

belt pretensioner LH.

3) Disconnect the connector (AB31) from cur-

tain airbag module LH.

4) Disconnect the airbag resistor from test har-

ness AJ.

5) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

6) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

7) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

8) Measure the resistance between connector

(3AJ) terminals in test harness AJ.

Connector & terminal

(3AJ) No. 1 — (3AJ) No. 2:

Is the resistance 1 MΩ or

more?

Go to step 4. Replace the airbag

rear harness along

with body harness.

4 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Go to step 5.

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

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AB(diag)-143

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

CO:DTC B1826 OPEN IN SIDE AIRBAG LH

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Side airbag harness LH circuit is open.

• Side airbag module LH is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module, side airbag

module LH and the side airbag sensor LH.

Is there poor contact? Replace the airbag

rear harness along

with body harness.

Go to step 2.

2 CHECK SIDE AIRBAG MODULE.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB19) from the

side airbag module LH, and connect the con-

nector (1AJ) in test harness AJ to the connector

(AB19).

3) Connect the airbag resistor to the test har-

ness AJ connector (3AJ).

4) Connect the battery ground terminal and

turn the ignition switch to ON.

Does the airbag warning light

illuminate for 6 seconds and go

off?

Replace the side

airbag module LH.

<Ref. to AB-43,

REMOVAL, Side

Airbag Module.>

Go to step 3.

AB17

1211

14 15

4251

AB62AB58

AB23

AB32

AB19

AB62 R123

AB32

AB17

AB58

AB19

AB23

AB-03484

AIRBAG CM

CURTAIN AIRBAG

SENSOR LH

SIDE AIRBAG

MODULE LH

SIDE AIRBAG

SENSOR LH

FRONT DOOR

IMPACT SENSOR LH

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AB(diag)-144

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

3 CHECK AIRBAG REAR HARNESS (SIDE

AIRBAG MODULE HARNESS LH).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB21) from seat

belt pretensioner LH.

3) Disconnect the connector (AB31) from cur-

tain airbag module LH.

4) Disconnect the airbag resistor from test har-

ness AJ.

5) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

6) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

7) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

8) Measure the resistance between connector

(4AG) or (5AG) in the test harness AG and con-

nector (3AJ) in the test harness AJ.

Connector & terminal

(4AG) No. 8 — (3AJ) No. 2:

(4AG) No. 10 — (3AJ) No. 1:

Is the resistance less than 10

Ω?

Go to step 4. Replace the airbag

rear harness along

with body harness.

4 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Go to step 5.

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

15WRX_STI_US_EN.book 144 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-145

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

CP:DTC B1827 SHORT IN SIDE AIRBAG LH (TO GROUND)

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Side airbag harness LH circuit is shorted to ground.

• Side airbag module LH is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module, side airbag

module LH and the side airbag sensor LH.

Is there poor contact? Replace the airbag

rear harness along

with body harness.

Go to step 2.

2 CHECK SIDE AIRBAG MODULE.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB19), and con-

nect the connector (1AJ) in test harness AJ to

connector (AB19).

3) Connect the airbag resistor to the test har-

ness AJ connector (3AJ).

4) Connect the battery ground terminal and

turn the ignition switch to ON.

Does the airbag warning light

illuminate for six seconds and

go off?

Replace the side

airbag module LH.

<Ref. to AB-43,

REMOVAL, Side

Airbag Module.>

Go to step 3.

AB17

1211

14 15

4251

AB62AB58

AB23

AB32

AB19

AB62 R123

AB32

AB17

AB58

AB19

AB23

AB-03484

AIRBAG CM

CURTAIN AIRBAG

SENSOR LH

SIDE AIRBAG

MODULE LH

SIDE AIRBAG

SENSOR LH

FRONT DOOR

IMPACT SENSOR LH

15WRX_STI_US_EN.book 145 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-146

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

3 CHECK AIRBAG REAR HARNESS (SIDE

AIRBAG MODULE HARNESS LH).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB21) from seat

belt pretensioner LH.

3) Disconnect the connector (AB31) from cur-

tain airbag module LH.

4) Disconnect the airbag resistor from test har-

ness.

5) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

6) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

7) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

8) Measure the resistance between connector

(3AJ) in the test harness AJ and chassis

ground.

Connector & terminal

(3AJ) No. 1 — Chassis ground:

(3AJ) No. 2 — Chassis ground:

Is the resistance 1 MΩ or

more?

Go to step 4. Replace the airbag

rear harness along

with body harness.

4 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Go to step 5.

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

15WRX_STI_US_EN.book 146 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-147

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

CQ:DTC B1828 SHORT IN SIDE AIRBAG LH (TO +B)

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Side airbag harness LH is shorted to power supply.

• Side airbag module LH is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module, side airbag

module LH and the side airbag sensor LH.

Is there poor contact? Replace the airbag

rear harness along

with body harness.

Go to step 2.

2 CHECK SIDE AIRBAG MODULE.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB19), and con-

nect the connector (1AJ) in test harness AJ to

connector (AB19).

3) Connect the airbag resistor to the test har-

ness AJ connector (3AJ).

4) Connect the battery ground terminal and

turn the ignition switch to ON.

Does the airbag warning light

illuminate for six seconds and

go off?

Replace the side

airbag module LH.

<Ref. to AB-43,

REMOVAL, Side

Airbag Module.>

Go to step 3.

AB17

1211

14 15

4251

AB62AB58

AB23

AB32

AB19

AB62 R123

AB32

AB17

AB58

AB19

AB23

AB-03484

AIRBAG CM

CURTAIN AIRBAG

SENSOR LH

SIDE AIRBAG

MODULE LH

SIDE AIRBAG

SENSOR LH

FRONT DOOR

IMPACT SENSOR LH

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AB(diag)-148

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

3 CHECK AIRBAG REAR HARNESS (SIDE

AIRBAG MODULE HARNESS LH).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB21) from seat

belt pretensioner LH.

3) Disconnect the connector (AB31) from cur-

tain airbag module LH.

4) Disconnect the airbag resistor from test har-

ness.

5) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

6) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

7) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

8) Connect the battery ground terminal and

turn the ignition switch to ON.

9) Measure the voltage between connector

(3AJ) in the test harness AJ and chassis

ground.

Connector & terminal

(3AJ) No. 1 (+) — Chassis ground (–):

(3AJ) No. 2 (+) — Chassis ground (–):

Is the voltage less than 1 V? Go to step 4. Replace the airbag

rear harness along

with body harness.

4 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Go to step 5.

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

15WRX_STI_US_EN.book 148 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-149

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

CR:DTC B1830 SHORT IN CURTAIN AIRBAG RH SQUIB CIRCUIT

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Curtain airbag harness RH circuit is shorted.

• Curtain airbag module RH is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module, curtain air-

bag module RH and the curtain airbag sensor

RH.

Is there poor contact? Replace the airbag

rear harness along

with body harness.

Go to step 2.

2 CHECK CURTAIN AIRBAG MODULE.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB33) from cur-

tain airbag module RH.

3) Connect the connector (1N) in the test har-

ness N to the connector (AB33).

4) Connect the airbag resistor to the connector

(2N) of test harness N.

5) Connect the battery ground terminal and

turn the ignition switch to ON.

Does the airbag warning light

illuminate for 6 seconds and go

off?

Replace the cur-

tain airbag module

RH. <Ref. to AB-

46, Curtain Airbag

Module.>

Go to step 3.

1524

1514

11 12

AB18

AB63 R124

AB63AB64

AB34

AB33

AB18

AB28

AB34

AB64

AB28

AB-03485

AIRBAG CM

CURTAIN AIRBAG

SENSOR RH

SIDE AIRBAG

SENSOR RH

CURTAIN AIRBAG

MODULE RH

FRONT DOOR

IMPACT SENSOR RH

15WRX_STI_US_EN.book 149 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-150

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

3 CHECK AIRBAG REAR HARNESS (CUR-

TAIN AIRBAG MODULE HARNESS RH).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB26) from seat

belt pretensioner RH.

3) Disconnect the connector (AB24) from side

airbag module RH.

4) Disconnect the airbag resistor from test har-

ness N.

5) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

6) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

7) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

8) Measure the resistance between connector

(2N) terminals in test harness N.

Connector & terminal

(2N) No. 1 — (2N) No. 2:

Is the resistance 1 MΩ or

more?

Go to step 4. Replace the airbag

rear harness along

with body harness.

4 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Go to step 5.

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

15WRX_STI_US_EN.book 150 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-151

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

CS:DTC B1831 OPEN IN CURTAIN AIRBAG RH SQUIB CIRCUIT

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Curtain airbag harness RH circuit is open.

• Curtain airbag module RH is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module, curtain air-

bag module RH and the curtain airbag sensor

RH.

Is there poor contact? Replace the airbag

rear harness along

with body harness.

Go to step 2.

2 CHECK CURTAIN AIRBAG MODULE.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB33) from cur-

tain airbag module RH.

3) Connect the connector (1N) in the test har-

ness N to the connector (AB33).

4) Connect the airbag resistor to the connector

(2N) of test harness N.

5) Connect the battery ground terminal and

turn the ignition switch to ON.

Does the airbag warning light

illuminate for 6 seconds and go

off?

Replace the cur-

tain airbag module

RH. <Ref. to AB-

46, Curtain Airbag

Module.>

Go to step 3.

1524

1514

11 12

AB18

AB63 R124

AB63AB64

AB34

AB33

AB18

AB28

AB34

AB64

AB28

AB-03485

AIRBAG CM

CURTAIN AIRBAG

SENSOR RH

SIDE AIRBAG

SENSOR RH

CURTAIN AIRBAG

MODULE RH

FRONT DOOR

IMPACT SENSOR RH

15WRX_STI_US_EN.book 151 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-152

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

3 CHECK AIRBAG REAR HARNESS (CUR-

TAIN AIRBAG MODULE HARNESS RH).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB26) from seat

belt pretensioner RH.

3) Disconnect the connector (AB24) from side

airbag module RH.

4) Disconnect the airbag resistor from test har-

ness N.

5) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

6) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

7) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

8) Measure the resistance between connector

(5AG) or (6AG) in the test harness AG and con-

nector (2N) in the test harness N.

Connector & terminal

(5AG) No. 6 — (2N) No. 2:

(5AG) No. 12 — (2N) No. 1:

Is the resistance less than 10

Ω?

Go to step 4. Replace the airbag

rear harness along

with body harness.

4 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Go to step 5.

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

15WRX_STI_US_EN.book 152 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-153

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

CT:DTC B1832 SHORT IN CURTAIN AIRBAG RH SQUIB CIRCUIT (TO GROUND)

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Curtain airbag harness RH circuit is shorted to ground.

• Curtain airbag module RH is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module, curtain air-

bag module RH and the curtain airbag sensor

RH.

Is there poor contact? Replace the airbag

rear harness along

with body harness.

Go to step 2.

2 CHECK CURTAIN AIRBAG MODULE.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB33), and con-

nect the connector (1N) in test harness N to

connector (AB33).

3) Connect the airbag resistor to the connector

(2N) of test harness N.

4) Connect the battery ground terminal and

turn the ignition switch to ON.

Does the airbag warning light

illuminate for six seconds and

go off?

Replace the cur-

tain airbag module

RH. <Ref. to AB-

46, Curtain Airbag

Module.>

Go to step 3.

1524

1514

11 12

AB18

AB63 R124

AB63AB64

AB34

AB33

AB18

AB28

AB34

AB64

AB28

AB-03485

AIRBAG CM

CURTAIN AIRBAG

SENSOR RH

SIDE AIRBAG

SENSOR RH

CURTAIN AIRBAG

MODULE RH

FRONT DOOR

IMPACT SENSOR RH

15WRX_STI_US_EN.book 153 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-154

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

3 CHECK AIRBAG REAR HARNESS (CUR-

TAIN AIRBAG MODULE HARNESS RH).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB26) from seat

belt pretensioner RH.

3) Disconnect the connector (AB24) from side

airbag module RH.

4) Disconnect the airbag resistor from test har-

ness N.

5) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

6) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

7) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

8) Measure the resistance between connector

(2N) in the test harness N and chassis ground.

Connector & terminal

(2N) No. 1 — Chassis ground:

(2N) No. 2 — Chassis ground:

Is the resistance 1 MΩ or

more?

Go to step 4. Replace the airbag

rear harness along

with body harness.

4 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Go to step 5.

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

15WRX_STI_US_EN.book 154 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-155

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

CU:DTC B1833 SHORT IN CURTAIN SHIELD AIRBAG RH SQUIB CIRCUIT (TO

+B)

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Curtain airbag harness RH is shorted to power supply.

• Curtain airbag module RH is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module, curtain air-

bag module RH and the curtain airbag sensor

RH.

Is there poor contact? Replace the airbag

rear harness along

with body harness.

Go to step 2.

2 CHECK CURTAIN AIRBAG MODULE.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB33), and con-

nect the connector (1N) in test harness N to

connector (AB33).

3) Connect the airbag resistor to the connector

(2N) of test harness N.

4) Connect the battery ground terminal and

turn the ignition switch to ON.

Does the airbag warning light

illuminate for six seconds and

go off?

Replace the cur-

tain airbag module

RH. <Ref. to AB-

46, Curtain Airbag

Module.>

Go to step 3.

1524

1514

11 12

AB18

AB63 R124

AB63AB64

AB34

AB33

AB18

AB28

AB34

AB64

AB28

AB-03485

AIRBAG CM

CURTAIN AIRBAG

SENSOR RH

SIDE AIRBAG

SENSOR RH

CURTAIN AIRBAG

MODULE RH

FRONT DOOR

IMPACT SENSOR RH

15WRX_STI_US_EN.book 155 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-156

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

3 CHECK AIRBAG REAR HARNESS (CUR-

TAIN AIRBAG MODULE HARNESS RH).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB26) from seat

belt pretensioner RH.

3) Disconnect the connector (AB24) from side

airbag module RH.

4) Disconnect the airbag resistor from test har-

ness N.

5) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

6) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

7) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

8) Connect the battery ground terminal and

turn the ignition switch to ON.

9) Measure the voltage between connector

(2N) in the test harness N and chassis ground.

Connector & terminal

(2N) No. 1 (+) — Chassis ground (–):

(2N) No. 2 (+) — Chassis ground (–):

Is the voltage less than 1 V? Go to step 4. Replace the airbag

rear harness along

with body harness.

4 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Go to step 5.

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

15WRX_STI_US_EN.book 156 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-157

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

CV:DTC B1835 SHORT IN CURTAIN AIRBAG LH SQUIB CIRCUIT

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Curtain airbag harness LH circuit is shorted.

• Curtain airbag module LH is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module, curtain air-

bag module LH and the curtain airbag sensor

LH.

Is there poor contact? Replace the airbag

rear harness along

with body harness.

Go to step 2.

2 CHECK CURTAIN AIRBAG MODULE.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB31) from cur-

tain airbag module LH.

3) Connect the connector (1N) in the test har-

ness N to the connector (AB31).

4) Connect the airbag resistor to the connector

(2N) of test harness N.

5) Connect the battery ground terminal and

turn the ignition switch to ON.

Does the airbag warning light

illuminate for 6 seconds and go

off?

Replace the cur-

tain airbag module

LH. <Ref. to AB-

46, Curtain Airbag

Module.>

Go to step 3.

1524

1514

11 12

AB17

AB62AB58

AB31

AB23

AB32

AB62 R123

AB32

AB31

AB17

AB58

AB23

AB-03486

AIRBAG CM

CURTAIN AIRBAG

SENSOR LH

SIDE AIRBAG

SENSOR LH

CURTAIN AIRBAG

MODULE LH

FRONT DOOR

IMPACT SENSOR LH

15WRX_STI_US_EN.book 157 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-158

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

3 CHECK AIRBAG REAR HARNESS (CUR-

TAIN AIRBAG MODULE HARNESS LH).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB21) from seat

belt pretensioner LH.

3) Disconnect the connector (AB19) from side

airbag module LH.

4) Disconnect the airbag resistor from test har-

ness N.

5) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

6) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

7) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

8) Measure the resistance between connector

(2N) terminals in test harness N.

Connector & terminal

(2N) No. 1 — (2N) No. 2:

Is the resistance 1 MΩ or

more?

Go to step 4. Replace the airbag

rear harness along

with body harness.

4 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Go to step 5.

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

15WRX_STI_US_EN.book 158 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-159

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

CW:DTC B1836 OPEN IN CURTAIN AIRBAG LH SQUIB CIRCUIT

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Curtain airbag harness LH circuit is open.

• Curtain airbag module LH is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module, curtain air-

bag module LH and the curtain airbag sensor

LH.

Is there poor contact? Replace the airbag

rear harness along

with body harness.

Go to step 2.

2 CHECK CURTAIN AIRBAG MODULE.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB31) from cur-

tain airbag module LH.

3) Connect the connector (1N) in the test har-

ness N to the connector (AB31).

4) Connect the airbag resistor to the connector

(2N) of test harness N.

5) Connect the battery ground terminal and

turn the ignition switch to ON.

Does the airbag warning light

illuminate for 6 seconds and go

off?

Replace the cur-

tain airbag module

LH. <Ref. to AB-

46, Curtain Airbag

Module.>

Go to step 3.

1524

1514

11 12

AB17

AB62AB58

AB31

AB23

AB32

AB62 R123

AB32

AB31

AB17

AB58

AB23

AB-03486

AIRBAG CM

CURTAIN AIRBAG

SENSOR LH

SIDE AIRBAG

SENSOR LH

CURTAIN AIRBAG

MODULE LH

FRONT DOOR

IMPACT SENSOR LH

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AB(diag)-160

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

3 CHECK AIRBAG REAR HARNESS (CUR-

TAIN AIRBAG MODULE HARNESS LH).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB21) from seat

belt pretensioner LH.

3) Disconnect the connector (AB19) from side

airbag module LH.

4) Disconnect the airbag resistor from test har-

ness N.

5) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

6) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

7) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

8) Measure the resistance between connector

(5AG) or (6AG) in the test harness AG and con-

nector (2N) in the test harness N.

Connector & terminal

(5AG) No. 2 — (2N) No. 2:

(5AG) No. 4 — (2N) No. 1:

Is the resistance less than 10

Ω?

Go to step 4. Replace the airbag

rear harness along

with body harness.

4 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Go to step 5.

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

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AB(diag)-161

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

CX:DTC B1837 SHORT IN CURTAIN AIRBAG LH SQUIB CIRCUIT (TO GROUND)

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Curtain airbag harness LH circuit is shorted to ground.

• Curtain airbag module LH is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module, curtain air-

bag module LH and the curtain airbag sensor

LH.

Is there poor contact? Replace the airbag

rear harness along

with body harness.

Go to step 2.

2 CHECK CURTAIN AIRBAG MODULE.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB31), and con-

nect the connector (1N) in test harness N to

connector (AB31).

3) Connect the airbag resistor to the connector

(2N) of test harness N.

4) Connect the battery ground terminal and

turn the ignition switch to ON.

Does the airbag warning light

illuminate for six seconds and

go off?

Replace the cur-

tain airbag module

LH. <Ref. to AB-

46, Curtain Airbag

Module.>

Go to step 3.

1524

1514

11 12

AB17

AB62AB58

AB31

AB23

AB32

AB62 R123

AB32

AB31

AB17

AB58

AB23

AB-03486

AIRBAG CM

CURTAIN AIRBAG

SENSOR LH

SIDE AIRBAG

SENSOR LH

CURTAIN AIRBAG

MODULE LH

FRONT DOOR

IMPACT SENSOR LH

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AB(diag)-162

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

3 CHECK AIRBAG REAR HARNESS (CUR-

TAIN AIRBAG MODULE HARNESS LH).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB21) from seat

belt pretensioner LH.

3) Disconnect the connector (AB19) from side

airbag module LH.

4) Disconnect the airbag resistor from test har-

ness N.

5) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

6) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

7) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

8) Measure the resistance between connector

(2N) in the test harness N and chassis ground.

Connector & terminal

(2N) No. 1 — Chassis ground:

(2N) No. 2 — Chassis ground:

Is the resistance 1 MΩ or

more?

Go to step 4. Replace the airbag

rear harness along

with body harness.

4 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Go to step 5.

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

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AB(diag)-163

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

CY:DTC B1838 SHORT IN CURTAIN SHIELD AIRBAG LH SQUIB CIRCUIT (TO

+B)

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Curtain airbag harness LH is shorted to power supply.

• Curtain airbag module LH is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module, curtain air-

bag module LH and the curtain airbag sensor

LH.

Is there poor contact? Replace the airbag

rear harness along

with body harness.

Go to step 2.

2 CHECK CURTAIN AIRBAG MODULE.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB31), and con-

nect the connector (1N) in test harness N to

connector (AB31).

3) Connect the airbag resistor to the connector

(2N) of test harness N.

4) Connect the battery ground terminal and

turn the ignition switch to ON.

Does the airbag warning light

illuminate for six seconds and

go off?

Replace the cur-

tain airbag module

LH. <Ref. to AB-

46, Curtain Airbag

Module.>

Go to step 3.

1524

1514

11 12

AB17

AB62AB58

AB31

AB23

AB32

AB62 R123

AB32

AB31

AB17

AB58

AB23

AB-03486

AIRBAG CM

CURTAIN AIRBAG

SENSOR LH

SIDE AIRBAG

SENSOR LH

CURTAIN AIRBAG

MODULE LH

FRONT DOOR

IMPACT SENSOR LH

15WRX_STI_US_EN.book 163 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-164

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

3 CHECK AIRBAG REAR HARNESS (CUR-

TAIN AIRBAG MODULE HARNESS LH).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB21) from seat

belt pretensioner LH.

3) Disconnect the connector (AB19) from side

airbag module LH.

4) Disconnect the airbag resistor from test har-

ness N.

5) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

6) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

7) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

8) Connect the battery ground terminal and

turn the ignition switch to ON.

9) Measure the voltage between connector

(2N) in the test harness N and chassis ground.

Connector & terminal

(2N) No. 1 (+) — Chassis ground (–):

(2N) No. 2 (+) — Chassis ground (–):

Is the voltage less than 1 V? Go to step 4. Replace the airbag

rear harness along

with body harness.

4 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Go to step 5.

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

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AB(diag)-165

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

CZ:DTC B1860 SHORT IN DRIVER’S KNEE AIRBAG

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Airbag main harness circuit is shorted.

• Knee airbag module harness circuit is shorted.

• Knee airbag module is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module and the

knee airbag module.

Is there poor contact? Replace the airbag

harness.

Go to step 2.

2 CHECK KNEE AIRBAG MODULE.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB66) from knee

airbag module.

3) Connect the connector (1N) in the test har-

ness N to the connector (AB66).

4) Connect the airbag resistor to the connector

(2N) of test harness N.

5) Connect the battery ground terminal and

turn the ignition switch to ON.

Does the airbag warning light

illuminate for six seconds and

go off?

Replace the knee

airbag module.

<Ref. to AB-35,

REMOVAL, Knee

Airbag Module.>

Go to step 3.

AB6

18 19 20

21 22 23 24 25 26 27 28

1234

11 12 13 14 16 1715

29 30

56789

AB66

AB6

AB-03077

AIRBAG CM

DRIVER'S

KNEE AIRBAG

MODULE

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AB(diag)-166

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

3 CHECK AIRBAG MAIN HARNESS (KNEE

AIRBAG HARNESS).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the airbag resistor from test har-

ness N.

3) Remove the instrument panel lower cover

and column cover, and disconnect the connec-

tor (AB7) from (AB2).

4) Remove the console front panel and discon-

nect the connector (AB9).

5) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

6) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

7) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

8) Measure the resistance between connector

(3AG) terminals in test harness AG.

Connector & terminal

(3AG) No. 14 — (3AG) No. 16:

Is the resistance 1 MΩ or

more?

Go to step 4. Replace the airbag

main harness

along with body

harness.

4 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Go to step 5.

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

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AB(diag)-167

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

DA:DTC B1861 OPEN IN DRIVER’S KNEE AIRBAG

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Airbag main harness circuit is open.

• Knee airbag module harness circuit is open.

• Knee airbag module is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module and the

knee airbag module.

Is there poor contact? Replace the airbag

harness.

Go to step 2.

2 CHECK KNEE AIRBAG MODULE.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB66) from knee

airbag module.

3) Connect the connector (1N) in the test har-

ness N to the connector (AB66).

4) Connect the airbag resistor to the connector

(2N) of test harness N.

5) Connect the battery ground terminal and

turn the ignition switch to ON.

Does the airbag warning light

illuminate for six seconds and

go off?

Replace the knee

airbag module.

<Ref. to AB-35,

REMOVAL, Knee

Airbag Module.>

Go to step 3.

AB6

18 19 20

21 22 23 24 25 26 27 28

1234

11 12 13 14 16 1715

29 30

56789

AB66

AB6

AB-03077

AIRBAG CM

DRIVER'S

KNEE AIRBAG

MODULE

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AB(diag)-168

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

3 CHECK AIRBAG MAIN HARNESS (KNEE

AIRBAG HARNESS).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the airbag resistor from test har-

ness N.

3) Remove the instrument panel lower cover

and column cover, and disconnect the connec-

tor (AB7) from (AB2).

4) Remove the console front panel and discon-

nect the connector (AB9).

5) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

6) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

7) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

8) Measure the resistance between connector

(3AG) in the test harness AG and connector

(2N) in the test harness N.

Connector & terminal

(3AG) No. 14 — (2N) No. 2:

(3AG) No. 16 — (2N) No. 1:

Is the resistance less than 10

Ω?

Go to step 4. Replace the airbag

main harness

along with body

harness.

4 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Go to step 5.

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

15WRX_STI_US_EN.book 168 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-169

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

DB:DTC B1862 SHORT IN DRIVER’S KNEE AIRBAG (TO GROUND)

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Airbag main harness circuit is shorted to ground.

• Knee airbag module harness circuit is shorted to ground.

• Knee airbag module is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module and the

knee airbag module.

Is there poor contact? Replace the airbag

harness.

Go to step 2.

2 CHECK KNEE AIRBAG MODULE.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB66) from knee

airbag module.

3) Connect the connector (1N) in the test har-

ness N to the connector (AB66).

4) Connect the airbag resistor to the connector

(2N) of test harness N.

5) Connect the battery ground terminal and

turn the ignition switch to ON.

Does the airbag warning light

illuminate for six seconds and

go off?

Replace the knee

airbag module.

<Ref. to AB-35,

REMOVAL, Knee

Airbag Module.>

Go to step 3.

AB6

18 19 20

21 22 23 24 25 26 27 28

1234

11 12 13 14 16 1715

29 30

56789

AB66

AB6

AB-03077

AIRBAG CM

DRIVER'S

KNEE AIRBAG

MODULE

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AB(diag)-170

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

3 CHECK AIRBAG MAIN HARNESS (KNEE

AIRBAG HARNESS).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the airbag resistor from test har-

ness N.

3) Remove the instrument panel lower cover

and column cover, and disconnect the connec-

tor (AB7) from (AB2).

4) Remove the console front panel and discon-

nect the connector (AB9).

5) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

6) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

7) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

8) Measure the resistance between connector

(3AG) in the test harness AG and chassis

ground.

Connector & terminal

(3AG) No. 14 — Chassis ground:

(3AG) No. 16 — Chassis ground:

Is the resistance 1 MΩ or

more?

Go to step 4. Replace the airbag

main harness

along with body

harness.

4 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Go to step 5.

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

15WRX_STI_US_EN.book 170 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-171

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

DC:DTC B1863 SHORT IN DRIVER’S KNEE AIRBAG (TO +B)

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Airbag main harness circuit is shorted to power supply.

• Knee airbag module harness circuit is shorted to power supply.

• Knee airbag module is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module and the

knee airbag module.

Is there poor contact? Replace the airbag

harness.

Go to step 2.

2 CHECK KNEE AIRBAG MODULE.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB66) from knee

airbag module.

3) Connect the connector (1N) in the test har-

ness N to the connector (AB66).

4) Connect the airbag resistor to the connector

(2N) of test harness N.

5) Connect the battery ground terminal and

turn the ignition switch to ON.

Does the airbag warning light

illuminate for six seconds and

go off?

Replace the knee

airbag module.

<Ref. to AB-35,

REMOVAL, Knee

Airbag Module.>

Go to step 3.

AB6

18 19 20

21 22 23 24 25 26 27 28

1234

11 12 13 14 16 1715

29 30

56789

AB66

AB6

AB-03077

AIRBAG CM

DRIVER'S

KNEE AIRBAG

MODULE

15WRX_STI_US_EN.book 171 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-172

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

3 CHECK AIRBAG MAIN HARNESS (KNEE

AIRBAG HARNESS).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the airbag resistor from test har-

ness N.

3) Remove the instrument panel lower cover

and column cover, and disconnect the connec-

tor (AB7) from (AB2).

4) Remove the console front panel and discon-

nect the connector (AB9).

5) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

6) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

7) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

8) Connect the battery ground terminal and

turn the ignition switch to ON.

9) Measure the voltage between connector

(3AG) in the test harness AG and chassis

ground.

Connector & terminal

(3AG) No. 14 (+) — Chassis ground (–):

(3AG) No. 16 (+) — Chassis ground (–):

Is the voltage less than 1 V? Go to step 4. Replace the airbag

main harness

along with body

harness.

4 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Go to step 5.

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

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AB(diag)-173

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

DD:DTC B1900 SHORT IN FRONT P/T RH

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Seat belt pretensioner RH circuit is shorted.

• Pretensioner RH is faulty.

• Pretensioner harness RH is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module and the seat

belt pretensioner RH.

Is there poor contact? Replace the airbag

rear harness along

with body harness.

Go to step 2.

2 CHECK SEAT BELT PRETENSIONER.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB26) from seat

belt pretensioner RH.

3) Connect the connector (1N) in the test har-

ness N to the connector (AB26).

4) Connect the airbag resistor to the connector

(2N) of test harness N.

5) Connect the battery ground terminal and

turn the ignition switch to ON.

Does the airbag warning light

illuminate for 6 seconds and go

off?

Replace the seat

belt pretensioner

RH. <Ref. to SB-

16, Front Seat

Belt.>

Go to step 3.

AB26

1524

1514

11 12

AB18

AB26

AB18

AB-03487

AIRBAG CM

PRETENSIONER RH

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AB(diag)-174

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

3 CHECK AIRBAG REAR HARNESS (PRE-

TENSIONER HARNESS RH).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the airbag resistor from test har-

ness N.

3) Disconnect the connector (AB24) from side

airbag module RH.

4) Disconnect the connector (AB33) from cur-

tain airbag module RH.

5) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

6) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

7) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

8) Measure the resistance between connector

(3AG) terminals in test harness AG.

Connector & terminal

(3AG) No. 18 — (3AG) No. 20:

Is the resistance 1 MΩ or

more?

Go to step 4. Replace the airbag

rear harness along

with body harness.

4 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Go to step 5.

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

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AB(diag)-175

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

DE:DTC B1901 OPEN IN FRONT P/T RH

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Seat belt pretensioner RH circuit is open.

• Pretensioner RH is faulty.

• Pretensioner harness RH is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module and the seat

belt pretensioner RH.

Is there poor contact? Replace the airbag

rear harness along

with body harness.

Go to step 2.

2 CHECK SEAT BELT PRETENSIONER.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB26) from seat

belt pretensioner RH.

3) Connect the connector (1N) in the test har-

ness N to the connector (AB26).

4) Connect the airbag resistor to the connector

(2N) of test harness N.

5) Connect the battery ground terminal and

turn the ignition switch to ON.

Does the airbag warning light

illuminate for 6 seconds and go

off?

Replace the seat

belt pretensioner

RH. <Ref. to SB-

16, Front Seat

Belt.>

Go to step 3.

AB26

1524

1514

11 12

AB18

AB26

AB18

AB-03487

AIRBAG CM

PRETENSIONER RH

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AB(diag)-176

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

3 CHECK AIRBAG REAR HARNESS (PRE-

TENSIONER HARNESS RH).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the airbag resistor from the con-

nector (2N) of test harness N.

3) Disconnect the connector (AB24) from side

airbag module RH.

4) Disconnect the connector (AB33) from cur-

tain airbag module RH.

5) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

6) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

7) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

8) Measure the resistance between connector

(3AG) in the test harness AG and connector

(2N) in the test harness N.

Connector & terminal

(3AG) No. 18 — (2N) No. 2:

(3AG) No. 20 — (2N) No. 1:

Is the resistance less than 10

Ω?

Go to step 4. Replace the airbag

rear harness along

with body harness.

4 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Go to step 5.

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

15WRX_STI_US_EN.book 176 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-177

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

DF:DTC B1902 SHORT IN FRONT P/T RH (TO GROUND)

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Seat belt pretensioner RH circuit is shorted to ground.

• Pretensioner RH is faulty.

• Pretensioner harness RH is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module and the seat

belt pretensioner RH.

Is there poor contact? Replace the airbag

rear harness along

with body harness.

Go to step 2.

2 CHECK SEAT BELT PRETENSIONER.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB26) from seat

belt pretensioner RH.

3) Connect the connector (1N) in the test har-

ness N to the connector (AB26).

4) Connect the airbag resistor to the connector

(2N) of test harness N.

5) Connect the battery ground terminal and

turn the ignition switch to ON.

Does the airbag warning light

illuminate for six seconds and

go off?

Replace the seat

belt pretensioner

RH. <Ref. to SB-

16, Front Seat

Belt.>

Go to step 3.

AB26

1524

1514

11 12

AB18

AB26

AB18

AB-03487

AIRBAG CM

PRETENSIONER RH

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AB(diag)-178

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

3 CHECK AIRBAG REAR HARNESS (PRE-

TENSIONER HARNESS RH).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the airbag resistor from the con-

nector (2N) of test harness N.

3) Disconnect the connector (AB24) from side

airbag module RH.

4) Disconnect the connector (AB33) from cur-

tain airbag module RH.

5) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

6) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

7) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

8) Measure the resistance between connector

(3AG) in the test harness AG and chassis

ground.

Connector & terminal

(3AG) No. 18 — Chassis ground:

(3AG) No. 20 — Chassis ground:

Is the resistance 1 MΩ or

more?

Go to step 4. Replace the airbag

rear harness along

with body harness.

4 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Go to step 5.

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

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AB(diag)-179

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

DG:DTC B1903 SHORT IN FRONT P/T RH (TO +B)

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Seat belt pretensioner RH circuit is shorted to power supply.

• Pretensioner RH is faulty.

• Pretensioner harness RH is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module and the seat

belt pretensioner RH.

Is there poor contact? Replace the airbag

rear harness along

with body harness.

Go to step 2.

2 CHECK SEAT BELT PRETENSIONER.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB26) from seat

belt pretensioner RH.

3) Connect the connector (1N) in the test har-

ness N to the connector (AB26).

4) Connect the airbag resistor to the connector

(2N) of test harness N.

5) Connect the battery ground terminal and

turn the ignition switch to ON.

Does the airbag warning light

illuminate for six seconds and

go off?

Replace the seat

belt pretensioner

RH. <Ref. to SB-

16, Front Seat

Belt.>

Go to step 3.

AB26

1524

1514

11 12

AB18

AB26

AB18

AB-03487

AIRBAG CM

PRETENSIONER RH

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AB(diag)-180

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

3 CHECK AIRBAG REAR HARNESS (PRE-

TENSIONER HARNESS RH).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the airbag resistor from the con-

nector (2N) of test harness N.

3) Disconnect the connector (AB24) from side

airbag module RH.

4) Disconnect the connector (AB33) from cur-

tain airbag module RH.

5) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

6) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

7) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

8) Connect the battery ground terminal and

turn the ignition switch to ON.

9) Measure the voltage between connector

(3AG) in the test harness AG and chassis

ground.

Connector & terminal

(3AG) No. 20 (+) — Chassis ground (–):

(3AG) No. 18 (+) — Chassis ground (–):

Is the voltage less than 1 V? Go to step 4. Replace the airbag

rear harness along

with body harness.

4 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Go to step 5.

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

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AB(diag)-181

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

DH:DTC B1905 SHORT IN FRONT P/T LH

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Seat belt pretensioner LH circuit is shorted.

• Pretensioner LH is faulty.

• Pretensioner harness LH is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module and the seat

belt pretensioner LH.

Is there poor contact? Replace the airbag

rear harness along

with body harness.

Go to step 2.

2 CHECK SEAT BELT PRETENSIONER.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB21) from seat

belt pretensioner LH.

3) Connect the connector (1N) in the test har-

ness N to the connector (AB21).

4) Connect the airbag resistor to the connector

(2N) of test harness N.

5) Connect the battery ground terminal and

turn the ignition switch to ON.

Does the airbag warning light

illuminate for 6 seconds and go

off?

Replace the seat

belt pretensioner

LH. <Ref. to SB-

16, Front Seat

Belt.>

Go to step 3.

1524

1514

11 12

AB17

AB21

AB17

AB-03488

AIRBAG CM

PRETENSIONER LH

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AB(diag)-182

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

3 CHECK AIRBAG REAR HARNESS (PRE-

TENSIONER HARNESS LH).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the airbag resistor from the con-

nector (2N) of test harness N.

3) Disconnect the connector (AB19) from side

airbag module LH.

4) Disconnect the connector (AB31) from cur-

tain airbag module LH.

5) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

6) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

7) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

8) Measure the resistance between connector

(3AG) terminals in test harness AG.

Connector & terminal

(3AG) No. 10 — (3AG) No. 12:

Is the resistance 1 MΩ or

more?

Go to step 4. Replace the airbag

rear harness along

with body harness.

4 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Go to step 5.

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

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AB(diag)-183

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

DI: DTC B1906 OPEN IN FRONT P/T LH

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Seat belt pretensioner LH circuit is open.

• Pretensioner LH is faulty.

• Pretensioner harness LH is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module and the seat

belt pretensioner LH.

Is there poor contact? Replace the airbag

rear harness along

with body harness.

Go to step 2.

2 CHECK SEAT BELT PRETENSIONER.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB21) from seat

belt pretensioner LH.

3) Connect the connector (1N) in the test har-

ness N to the connector (AB21).

4) Connect the airbag resistor to the connector

(2N) of test harness N.

5) Connect the battery ground terminal and

turn the ignition switch to ON.

Does the airbag warning light

illuminate for 6 seconds and go

off?

Replace the seat

belt pretensioner

LH. <Ref. to SB-

16, Front Seat

Belt.>

Go to step 3.

1524

1514

11 12

AB17

AB21

AB17

AB-03488

AIRBAG CM

PRETENSIONER LH

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AB(diag)-184

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

3 CHECK AIRBAG REAR HARNESS (PRE-

TENSIONER HARNESS LH).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the airbag resistor from the con-

nector (2N) of test harness N.

3) Disconnect the connector (AB19) from side

airbag module LH.

4) Disconnect the connector (AB31) from cur-

tain airbag module LH.

5) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

6) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

7) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

8) Measure the resistance between connector

(3AG) in the test harness AG and connector

(2N) in the test harness N.

Connector & terminal

(3AG) No. 10 — (2N) No. 1:

(3AG) No. 12 — (2N) No. 2:

Is the resistance less than 10

Ω?

Go to step 4. Replace the airbag

rear harness along

with body harness.

4 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Go to step 5.

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

15WRX_STI_US_EN.book 184 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-185

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

DJ:DTC B1907 SHORT IN FRONT P/T LH (TO GROUND)

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Seat belt pretensioner LH circuit is shorted to ground.

• Pretensioner LH is faulty.

• Pretensioner harness LH is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module and the seat

belt pretensioner LH.

Is there poor contact? Replace the airbag

rear harness along

with body harness.

Go to step 2.

2 CHECK SEAT BELT PRETENSIONER.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB21) from seat

belt pretensioner LH.

3) Connect the connector (1N) in the test har-

ness N to the connector (AB21).

4) Connect the airbag resistor to the connector

(2N) of test harness N.

5) Connect the battery ground terminal and

turn the ignition switch to ON.

Does the airbag warning light

illuminate for six seconds and

go off?

Replace the seat

belt pretensioner

LH. <Ref. to SB-

16, Front Seat

Belt.>

Go to step 3.

1524

1514

11 12

AB17

AB21

AB17

AB-03488

AIRBAG CM

PRETENSIONER LH

15WRX_STI_US_EN.book 185 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-186

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

3 CHECK AIRBAG REAR HARNESS (PRE-

TENSIONER HARNESS LH).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the airbag resistor from the con-

nector (2N) of test harness N.

3) Disconnect the connector (AB19) from side

airbag module LH.

4) Disconnect the connector (AB31) from cur-

tain airbag module LH.

5) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

6) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

7) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

8) Measure the resistance between connector

(3AG) in the test harness AG and chassis

ground.

Connector & terminal

(3AG) No. 10 — Chassis ground:

(3AG) No. 12 — Chassis ground:

Is the resistance 1 MΩ or

more?

Go to step 4. Replace the airbag

rear harness along

with body harness.

4 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Go to step 5.

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

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AB(diag)-187

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

DK:DTC B1908 SHORT IN FRONT P/T LH (TO +B)

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Seat belt pretensioner LH circuit is shorted to power supply.

• Pretensioner LH is faulty.

• Pretensioner harness LH is faulty.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module and the seat

belt pretensioner LH.

Is there poor contact? Replace the airbag

rear harness along

with body harness.

Go to step 2.

2 CHECK SEAT BELT PRETENSIONER.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB21) from seat

belt pretensioner LH.

3) Connect the connector (1N) in the test har-

ness N to the connector (AB21).

4) Connect the airbag resistor to the connector

(2N) of test harness N.

5) Connect the battery ground terminal and

turn the ignition switch to ON.

Does the airbag warning light

illuminate for six seconds and

go off?

Replace the seat

belt pretensioner

LH. <Ref. to SB-

16, Front Seat

Belt.>

Go to step 3.

1524

1514

11 12

AB17

AB21

AB17

AB-03488

AIRBAG CM

PRETENSIONER LH

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AB(diag)-188

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

3 CHECK AIRBAG REAR HARNESS (PRE-

TENSIONER HARNESS LH).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the airbag resistor from the con-

nector (2N) of test harness N.

3) Disconnect the connector (AB19) from side

airbag module LH.

4) Disconnect the connector (AB31) from cur-

tain airbag module LH.

5) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

6) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

7) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

8) Connect the battery ground terminal and

turn the ignition switch to ON.

9) Measure the voltage between connector

(3AG) in the test harness AG and chassis

ground.

Connector & terminal

(3AG) No. 10 (+) — Chassis ground (–):

(3AG) No. 12 (+) — Chassis ground (–):

Is the voltage less than 1 V? Go to step 4. Replace the airbag

rear harness along

with body harness.

4 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Go to step 5.

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

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AB(diag)-189

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

DL:DTC B19F0 SHORT IN FRONT P/T 2 RH

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Lap seat belt pretensioner RH circuit is shorted.

• Lap seat belt pretensioner RH is faulty.

• Lap seat belt pretensioner harness RH is shorted.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module and the lap

seat belt pretensioner RH.

Is there poor contact? Replace the airbag

rear harness along

with body harness.

Go to step 2.

2 CHECK LAP SEAT BELT PRETENSIONER.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB30) from the

lap seat belt pretensioner RH.

3) Connect the connector (1N) in the test har-

ness N to the connector (AB30).

4) Connect the airbag resistor to the connector

(2N) of test harness N.

5) Connect the battery ground terminal and

turn the ignition switch to ON.

Does the airbag warning light

illuminate for 6 seconds and go

off?

Replace the lap

seat belt preten-

sioner RH. <Ref. to

SB-17, SEAT BELT

INNER - FRONT,

REMOVAL, Front

Seat Belt.>

Go to step 3.

1524

1514

11 12

AB18

AB30

AB18

AB-03489

AIRBAG CM

LAP SEAT BELT

PRETENSIONER RH

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AB(diag)-190

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

3 CHECK AIRBAG REAR HARNESS (LAP

SEAT BELT PRETENSIONER HARNESS

RH).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the airbag resistor from test har-

ness N.

3) Disconnect the connector (AB33) from cur-

tain airbag module RH.

4) Disconnect the connector (AB24) from side

airbag module RH.

5) Disconnect the connector (AB26) from seat

belt pretensioner.

6) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

7) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

8) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

9) Measure the resistance between connector

(3AG) terminals in test harness AG.

Connector & terminal

(3AG) No. 17 — (3AG) No. 19:

Is the resistance less than 10

Ω?

Go to step 4. Replace the airbag

rear harness along

with body harness.

4 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Go to step 5.

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

15WRX_STI_US_EN.book 190 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-191

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

DM:DTC B19F1 OPEN IN FRONT P/T 2 RH

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Lap seat belt pretensioner RH circuit is open.

• Lap seat belt pretensioner RH is faulty.

• Lap seat belt pretensioner harness RH is open.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module and the lap

seat belt pretensioner RH.

Is there poor contact? Replace the airbag

rear harness along

with body harness.

Go to step 2.

2 CHECK LAP SEAT BELT PRETENSIONER.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB30) from the

lap seat belt pretensioner RH.

3) Connect the connector (1N) in the test har-

ness N to the connector (AB30).

4) Connect the airbag resistor to the connector

(2N) of test harness N.

5) Connect the battery ground terminal and

turn the ignition switch to ON.

Does the airbag warning light

illuminate for 6 seconds and go

off?

Replace the lap

seat belt preten-

sioner RH. <Ref. to

SB-17, SEAT BELT

INNER - FRONT,

REMOVAL, Front

Seat Belt.>

Go to step 3.

1524

1514

11 12

AB18

AB30

AB18

AB-03489

AIRBAG CM

LAP SEAT BELT

PRETENSIONER RH

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AB(diag)-192

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

3 CHECK AIRBAG REAR HARNESS (SIDE

AIRBAG HARNESS RH).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the airbag resistor from test har-

ness N.

3) Disconnect the connector (AB33) from cur-

tain airbag module RH.

4) Disconnect the connector (AB24) from side

airbag module RH.

5) Disconnect the connector (AB26) from seat

belt pretensioner.

6) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

7) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

8) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

9) Measure the resistance between connector

(3AG) in the test harness AG and connector

(2N) in the test harness N.

Connector & terminal

(3AG) No. 17 — (2N) No. 2:

(3AG) No. 19 — (2N) No. 1:

Is the resistance less than 10

Ω?

Go to step 4. Replace the airbag

rear harness along

with body harness.

4 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Go to step 5.

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

15WRX_STI_US_EN.book 192 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-193

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

DN:DTC B19F2 SHORT IN FRONT P/T 2 RH (TO GROUND)

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Lap seat belt pretensioner RH circuit is shorted to ground.

• Lap seat belt pretensioner RH is faulty.

• Lap seat belt pretensioner harness RH is shorted to ground.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module and the lap

seat belt pretensioner RH.

Is there poor contact? Replace the airbag

rear harness along

with body harness.

Go to step 2.

2 CHECK LAP SEAT BELT PRETENSIONER.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB30) from the

lap seat belt pretensioner RH.

3) Connect the connector (1N) in the test har-

ness N to the connector (AB30).

4) Connect the airbag resistor to the connector

(2N) of test harness N.

5) Connect the battery ground terminal and

turn the ignition switch to ON.

Does the airbag warning light

illuminate for 6 seconds and go

off?

Replace the lap

seat belt preten-

sioner RH. <Ref. to

SB-17, SEAT BELT

INNER - FRONT,

REMOVAL, Front

Seat Belt.>

Go to step 3.

1524

1514

11 12

AB18

AB30

AB18

AB-03489

AIRBAG CM

LAP SEAT BELT

PRETENSIONER RH

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AB(diag)-194

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

3 CHECK AIRBAG REAR HARNESS (LAP

SEAT BELT PRETENSIONER HARNESS

RH).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the airbag resistor from test har-

ness N.

3) Disconnect the connector (AB33) from cur-

tain airbag module RH.

4) Disconnect the connector (AB24) from side

airbag module RH.

5) Disconnect the connector (AB26) from seat

belt pretensioner.

6) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

7) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

8) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

9) Measure the resistance between connector

(3AG) in the test harness AG and chassis

ground.

Connector & terminal

(3AG) No. 17 — Chassis ground:

(3AG) No. 19 — Chassis ground:

Is the resistance 1 MΩ or

more?

Go to step 4. Replace the airbag

rear harness along

with body harness.

4 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Go to step 5.

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

15WRX_STI_US_EN.book 194 ページ２０１５年２月１３日　金曜日　午前１１時２０分

AB(diag)-195

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

DO:DTC B19F3 SHORT IN FRONT P/T 2 RH (TO +B)

DIAGNOSIS START CONDITION:

Ignition voltage is 10 V to 16 V.

DTC DETECTING CONDITION:

• Lap seat belt pretensioner RH circuit is shorted to power supply.

• Lap seat belt pretensioner RH is faulty.

• Lap seat belt pretensioner harness RH is shorted to power supply.

• Airbag control module is faulty.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. <Ref. to AB(diag)-4,

CAUTION, General Description.>

WIRING DIAGRAM:

Airbag system <Ref. to WI-73, WIRING DIAGRAM, Airbag System.>

Step Check Yes No

1 CHECK POOR CONTACT OF CONNEC-

TORS.

Check for poor contact of the connectors

between the airbag control module and the lap

seat belt pretensioner RH.

Is there poor contact? Replace the airbag

rear harness along

with body harness.

Go to step 2.

2 CHECK LAP SEAT BELT PRETENSIONER.

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the connector (AB30) from the

lap seat belt pretensioner RH.

3) Connect the connector (1N) in the test har-

ness N to the connector (AB30).

4) Connect the airbag resistor to the connector

(2N) of test harness N.

5) Connect the battery ground terminal and

turn the ignition switch to ON.

Does the airbag warning light

illuminate for 6 seconds and go

off?

Replace the lap

seat belt preten-

sioner RH. <Ref. to

SB-17, SEAT BELT

INNER - FRONT,

REMOVAL, Front

Seat Belt.>

Go to step 3.

1524

1514

11 12

AB18

AB30

AB18

AB-03489

AIRBAG CM

LAP SEAT BELT

PRETENSIONER RH

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AB(diag)-196

Diagnostic Chart with Trouble Code

AIRBAG SYSTEM (DIAGNOSTICS)

3 CHECK AIRBAG REAR HARNESS (LAP

SEAT BELT PRETENSIONER HARNESS

RH).

1) Turn the ignition switch to OFF, disconnect

the battery ground cable, and wait for 60 sec-

onds or more.

2) Disconnect the airbag resistor from test har-

ness N.

3) Disconnect the connector (AB33) from cur-

tain airbag module RH.

4) Disconnect the connector (AB24) from side

airbag module RH.

5) Disconnect the connector (AB26) from seat

belt pretensioner.

6) Disconnect the connectors (AB6, AB17,

AB18) from airbag control module.

7) Connect the connector (1AH) in the test har-

ness AH to the connectors (AB6, AB17, AB18).

8) Connect the connector (2AH) in the test har-

ness AH and the connector (1AG) in the test

harness AG.

9) Connect the battery ground terminal and

turn the ignition switch to ON.

10) Measure the voltage between connector

(3AG) in the test harness AG and chassis

ground.

Connector & terminal

(3AG) No. 17 (+) — Chassis ground (–):

(3AG) No. 19 (+) — Chassis ground (–):

Is the voltage less than 1 V? Go to step 4. Replace the airbag

rear harness along

with body harness.

4 CHECK AIRBAG CONTROL MODULE.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC. (Current malfunction)

Is the same DTC displayed? Replace the airbag

control module.

<Ref. to AB-48,

Airbag Control

Module.>

Go to step 5.

5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Check DTC using

“List of Diagnostic

Trouble Code

(DTC)”. <Ref. to

AB(diag)-33, List

of Diagnostic Trou-

ble Code (DTC).>

Finish the diagno-

sis.

Step Check Yes No

15WRX_STI_US_EN.book 196 ページ２０１５年２月１３日　金曜日　午前１１時２０分

OCCUPANT DETECTION SYSTEM (DIAG-

NOSTICS)

OD(diag)

Page

1. Basic Diagnostic Procedure .......................................................................2

2. Check List for Interview ..............................................................................3

3. General Description ...................................................................................4

4. Electrical Component Location ..................................................................8

5. Airbag Connector .......................................................................................9

6. Control Module I/O Signal ........................................................................10

7. Subaru Select Monitor ..............................................................................11

8. Read Diagnostic Trouble Code (DTC) .....................................................12

9. Inspection Mode .......................................................................................13

10. Clear Memory Mode .................................................................................14

11. Read Current Data ...................................................................................15

12. Airbag Warning Light Illumination Pattern ................................................16

13. Passenger’s Airbag ON/OFF Indicator Light Illumination Pattern ............17

14. List of Diagnostic Trouble Code (DTC) ....................................................18

15. Diagnostic Procedure with Diagnostic Trouble Code (DTC) ....................19

15WRX_STI_US_EN.book 1 ページ２０１５年２月１３日　金曜日　午前１１時２０分